Finding the Fourth Proportional to 156,622.32, 216,138.72 and 88,638.06

Step by Step Solution

1. Step 1: Write the proportion equation
   156,622.32 : 216,138.72 = 88,638.06 : x
2. Step 2: Convert to fraction form
   156,622.32/216,138.72 = 88,638.06/x
3. Step 3: Cross multiply
   156,622.32x = 216,138.72 × 88,638.06
4. Step 4: Simplify right side
   156,622.32x = 19,158,116,831.68
5. Step 5: Solve for x
   x = 19,158,116,831.68/156,622.32
6. Step 6: Final answer
   x = 122,320.48