Finding the Fourth Proportional to 117,085.30, 161,468.06 and 77,724.68

Step by Step Solution

1. Step 1: Write the proportion equation
   117,085.30 : 161,468.06 = 77,724.68 : x
2. Step 2: Convert to fraction form
   117,085.30/161,468.06 = 77,724.68/x
3. Step 3: Cross multiply
   117,085.30x = 161,468.06 × 77,724.68
4. Step 4: Simplify right side
   117,085.30x = 12,550,053,293.72
5. Step 5: Solve for x
   x = 12,550,053,293.72/117,085.30
6. Step 6: Final answer
   x = 107,187.27