Finding the Fourth Proportional to 156,086.40, 215,400.83 and 84,468.09

Step by Step Solution

1. Step 1: Write the proportion equation
   156,086.40 : 215,400.83 = 84,468.09 : x
2. Step 2: Convert to fraction form
   156,086.40/215,400.83 = 84,468.09/x
3. Step 3: Cross multiply
   156,086.40x = 215,400.83 × 84,468.09
4. Step 4: Simplify right side
   156,086.40x = 18,194,496,272.17
5. Step 5: Solve for x
   x = 18,194,496,272.17/156,086.40
6. Step 6: Final answer
   x = 116,566.83