Finding the Fourth Proportional to 156,089.87, 215,404 and 84,469.88

Step by Step Solution

1. Step 1: Write the proportion equation
   156,089.87 : 215,404 = 84,469.88 : x
2. Step 2: Convert to fraction form
   156,089.87/215,404 = 84,469.88/x
3. Step 3: Cross multiply
   156,089.87x = 215,404 × 84,469.88
4. Step 4: Simplify right side
   156,089.87x = 18,195,150,031.52
5. Step 5: Solve for x
   x = 18,195,150,031.52/156,089.87
6. Step 6: Final answer
   x = 116,568.42