Finding the Fourth Proportional to 117,105.60, 161,606.12 and 63,390.60

Step by Step Solution

1. Step 1: Write the proportion equation
   117,105.60 : 161,606.12 = 63,390.60 : x
2. Step 2: Convert to fraction form
   117,105.60/161,606.12 = 63,390.60/x
3. Step 3: Cross multiply
   117,105.60x = 161,606.12 × 63,390.60
4. Step 4: Simplify right side
   117,105.60x = 10,244,308,910.47
5. Step 5: Solve for x
   x = 10,244,308,910.47/117,105.60
6. Step 6: Final answer
   x = 87,479.24