Finding the Fourth Proportional to 64,673,501.42, 89,022,898.40 and 56,398,965.05

Step by Step Solution

1. Step 1: Write the proportion equation
   64,673,501.42 : 89,022,898.40 = 56,398,965.05 : x
2. Step 2: Convert to fraction form
   64,673,501.42/89,022,898.40 = 56,398,965.05/x
3. Step 3: Cross multiply
   64,673,501.42x = 89,022,898.40 × 56,398,965.05
4. Step 4: Simplify right side
   64,673,501.42x = 5,020,799,335,511,301
5. Step 5: Solve for x
   x = 5,020,799,335,511,301/64,673,501.42
6. Step 6: Final answer
   x = 77,633,021.64