Finding the Fourth Proportional to 116,700.30, 174,904.65 and 85,499.10

Step by Step Solution

1. Step 1: Write the proportion equation
   116,700.30 : 174,904.65 = 85,499.10 : x
2. Step 2: Convert to fraction form
   116,700.30/174,904.65 = 85,499.10/x
3. Step 3: Cross multiply
   116,700.30x = 174,904.65 × 85,499.10
4. Step 4: Simplify right side
   116,700.30x = 14,954,190,160.82
5. Step 5: Solve for x
   x = 14,954,190,160.82/116,700.30
6. Step 6: Final answer
   x = 128,141.83