Finding the Fourth Proportional to 9,770,991.75, 13,485,585.71 and 5,421,479.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,770,991.75 : 13,485,585.71 = 5,421,479.31 : x
2. Step 2: Convert to fraction form
   9,770,991.75/13,485,585.71 = 5,421,479.31/x
3. Step 3: Cross multiply
   9,770,991.75x = 13,485,585.71 × 5,421,479.31
4. Step 4: Simplify right side
   9,770,991.75x = 73,111,823,909,996.66
5. Step 5: Solve for x
   x = 73,111,823,909,996.66/9,770,991.75
6. Step 6: Final answer
   x = 7,482,538.70