Finding the Fourth Proportional to 1,012,555,123.42, 1,397,241,606.63 and 938,521,849.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012,555,123.42 : 1,397,241,606.63 = 938,521,849.18 : x
2. Step 2: Convert to fraction form
   1,012,555,123.42/1,397,241,606.63 = 938,521,849.18/x
3. Step 3: Cross multiply
   1,012,555,123.42x = 1,397,241,606.63 × 938,521,849.18
4. Step 4: Simplify right side
   1,012,555,123.42x = 1,311,341,776,405,621,760
5. Step 5: Solve for x
   x = 1,311,341,776,405,621,760/1,012,555,123.42
6. Step 6: Final answer
   x = 1,295,081,863.77