Finding the Fourth Proportional to 117,131.85, 161,640.00 and 63,416.43

Step by Step Solution

1. Step 1: Write the proportion equation
   117,131.85 : 161,640.00 = 63,416.43 : x
2. Step 2: Convert to fraction form
   117,131.85/161,640.00 = 63,416.43/x
3. Step 3: Cross multiply
   117,131.85x = 161,640.00 × 63,416.43
4. Step 4: Simplify right side
   117,131.85x = 10,250,631,428.12
5. Step 5: Solve for x
   x = 10,250,631,428.12/117,131.85
6. Step 6: Final answer
   x = 87,513.61