Finding the Fourth Proportional to 64,673,502.42, 89,022,899.78 and 56,398,966.06

Step by Step Solution

1. Step 1: Write the proportion equation
   64,673,502.42 : 89,022,899.78 = 56,398,966.06 : x
2. Step 2: Convert to fraction form
   64,673,502.42/89,022,899.78 = 56,398,966.06/x
3. Step 3: Cross multiply
   64,673,502.42x = 89,022,899.78 × 56,398,966.06
4. Step 4: Simplify right side
   64,673,502.42x = 5,020,799,503,255,002
5. Step 5: Solve for x
   x = 5,020,799,503,255,002/64,673,502.42
6. Step 6: Final answer
   x = 77,633,023.04