Finding the Fourth Proportional to 117,144.72, 161,658.98 and 63,428.60

Step by Step Solution

1. Step 1: Write the proportion equation
   117,144.72 : 161,658.98 = 63,428.60 : x
2. Step 2: Convert to fraction form
   117,144.72/161,658.98 = 63,428.60/x
3. Step 3: Cross multiply
   117,144.72x = 161,658.98 × 63,428.60
4. Step 4: Simplify right side
   117,144.72x = 10,253,802,778.83
5. Step 5: Solve for x
   x = 10,253,802,778.83/117,144.72
6. Step 6: Final answer
   x = 87,531.07