Finding the Fourth Proportional to 116,066.49, 173,875.56 and 85,617.99

Step by Step Solution

1. Step 1: Write the proportion equation
   116,066.49 : 173,875.56 = 85,617.99 : x
2. Step 2: Convert to fraction form
   116,066.49/173,875.56 = 85,617.99/x
3. Step 3: Cross multiply
   116,066.49x = 173,875.56 × 85,617.99
4. Step 4: Simplify right side
   116,066.49x = 14,886,875,957.32
5. Step 5: Solve for x
   x = 14,886,875,957.32/116,066.49
6. Step 6: Final answer
   x = 128,261.62