Finding the Fourth Proportional to 117,120,932.56, 161,626,902.32 and 64,913,338.80

Step by Step Solution

1. Step 1: Write the proportion equation
   117,120,932.56 : 161,626,902.32 = 64,913,338.80 : x
2. Step 2: Convert to fraction form
   117,120,932.56/161,626,902.32 = 64,913,338.80/x
3. Step 3: Cross multiply
   117,120,932.56x = 161,626,902.32 × 64,913,338.80
4. Step 4: Simplify right side
   117,120,932.56x = 10,491,741,869,492,666
5. Step 5: Solve for x
   x = 10,491,741,869,492,666/117,120,932.56
6. Step 6: Final answer
   x = 89,580,416.07