Finding the Fourth Proportional to 99,595,514.79, 137,394,902.61 and 64,775,500.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,595,514.79 : 137,394,902.61 = 64,775,500.47 : x
2. Step 2: Convert to fraction form
   99,595,514.79/137,394,902.61 = 64,775,500.47/x
3. Step 3: Cross multiply
   99,595,514.79x = 137,394,902.61 × 64,775,500.47
4. Step 4: Simplify right side
   99,595,514.79x = 8,899,823,578,589,660
5. Step 5: Solve for x
   x = 8,899,823,578,589,660/99,595,514.79
6. Step 6: Final answer
   x = 89,359,682.49