Finding the Fourth Proportional to 156,168.76, 215,288.92 and 111,379

Step by Step Solution

1. Step 1: Write the proportion equation
   156,168.76 : 215,288.92 = 111,379 : x
2. Step 2: Convert to fraction form
   156,168.76/215,288.92 = 111,379/x
3. Step 3: Cross multiply
   156,168.76x = 215,288.92 × 111,379
4. Step 4: Simplify right side
   156,168.76x = 23,978,664,620.68
5. Step 5: Solve for x
   x = 23,978,664,620.68/156,168.76
6. Step 6: Final answer
   x = 153,543.29