Finding the Fourth Proportional to 1,406,807.42, 2,109,780.20 and 508,138.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406,807.42 : 2,109,780.20 = 508,138.34 : x
2. Step 2: Convert to fraction form
   1,406,807.42/2,109,780.20 = 508,138.34/x
3. Step 3: Cross multiply
   1,406,807.42x = 2,109,780.20 × 508,138.34
4. Step 4: Simplify right side
   1,406,807.42x = 1,072,060,199,314.31
5. Step 5: Solve for x
   x = 1,072,060,199,314.31/1,406,807.42
6. Step 6: Final answer
   x = 762,051.85