Finding the Fourth Proportional to 156,031.72, 215,322.90 and 84,411.52

Step by Step Solution

1. Step 1: Write the proportion equation
   156,031.72 : 215,322.90 = 84,411.52 : x
2. Step 2: Convert to fraction form
   156,031.72/215,322.90 = 84,411.52/x
3. Step 3: Cross multiply
   156,031.72x = 215,322.90 × 84,411.52
4. Step 4: Simplify right side
   156,031.72x = 18,175,733,279.81
5. Step 5: Solve for x
   x = 18,175,733,279.81/156,031.72
6. Step 6: Final answer
   x = 116,487.42