Finding the Fourth Proportional to 156,595.68, 216,064.56 and 89,510.88

Step by Step Solution

1. Step 1: Write the proportion equation
   156,595.68 : 216,064.56 = 89,510.88 : x
2. Step 2: Convert to fraction form
   156,595.68/216,064.56 = 89,510.88/x
3. Step 3: Cross multiply
   156,595.68x = 216,064.56 × 89,510.88
4. Step 4: Simplify right side
   156,595.68x = 19,340,128,902.41
5. Step 5: Solve for x
   x = 19,340,128,902.41/156,595.68
6. Step 6: Final answer
   x = 123,503.59