Finding the Fourth Proportional to 149,016.40, 205,592.30 and 84,478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   149,016.40 : 205,592.30 = 84,478.72 : x
2. Step 2: Convert to fraction form
   149,016.40/205,592.30 = 84,478.72/x
3. Step 3: Cross multiply
   149,016.40x = 205,592.30 × 84,478.72
4. Step 4: Simplify right side
   149,016.40x = 17,368,174,345.86
5. Step 5: Solve for x
   x = 17,368,174,345.86/149,016.40
6. Step 6: Final answer
   x = 116,552.10