Finding the Fourth Proportional to 156,022.50, 215,309.88 and 84,401.49

Step by Step Solution

1. Step 1: Write the proportion equation
   156,022.50 : 215,309.88 = 84,401.49 : x
2. Step 2: Convert to fraction form
   156,022.50/215,309.88 = 84,401.49/x
3. Step 3: Cross multiply
   156,022.50x = 215,309.88 × 84,401.49
4. Step 4: Simplify right side
   156,022.50x = 18,172,474,683.72
5. Step 5: Solve for x
   x = 18,172,474,683.72/156,022.50
6. Step 6: Final answer
   x = 116,473.42