Finding the Fourth Proportional to 123,465.18, 185,200.50 and 85,477.02

Step by Step Solution

1. Step 1: Write the proportion equation
   123,465.18 : 185,200.50 = 85,477.02 : x
2. Step 2: Convert to fraction form
   123,465.18/185,200.50 = 85,477.02/x
3. Step 3: Cross multiply
   123,465.18x = 185,200.50 × 85,477.02
4. Step 4: Simplify right side
   123,465.18x = 15,830,386,842.51
5. Step 5: Solve for x
   x = 15,830,386,842.51/123,465.18
6. Step 6: Final answer
   x = 128,217.42