Finding the Fourth Proportional to 64,673,498.42, 89,022,894.26 and 56,398,962.05

Step by Step Solution

1. Step 1: Write the proportion equation
   64,673,498.42 : 89,022,894.26 = 56,398,962.05 : x
2. Step 2: Convert to fraction form
   64,673,498.42/89,022,894.26 = 56,398,962.05/x
3. Step 3: Cross multiply
   64,673,498.42x = 89,022,894.26 × 56,398,962.05
4. Step 4: Simplify right side
   64,673,498.42x = 5,020,798,834,950,903
5. Step 5: Solve for x
   x = 5,020,798,834,950,903/64,673,498.42
6. Step 6: Final answer
   x = 77,633,017.51