Finding the Fourth Proportional to 156,890.56, 216,521.76 and 89,826.88

Step by Step Solution

1. Step 1: Write the proportion equation
   156,890.56 : 216,521.76 = 89,826.88 : x
2. Step 2: Convert to fraction form
   156,890.56/216,521.76 = 89,826.88/x
3. Step 3: Cross multiply
   156,890.56x = 216,521.76 × 89,826.88
4. Step 4: Simplify right side
   156,890.56x = 19,449,474,152.91
5. Step 5: Solve for x
   x = 19,449,474,152.91/156,890.56
6. Step 6: Final answer
   x = 123,968.42