Finding the Fourth Proportional to 156,253.16, 215,667.94 and 89,224.04

Step by Step Solution

1. Step 1: Write the proportion equation
   156,253.16 : 215,667.94 = 89,224.04 : x
2. Step 2: Convert to fraction form
   156,253.16/215,667.94 = 89,224.04/x
3. Step 3: Cross multiply
   156,253.16x = 215,667.94 × 89,224.04
4. Step 4: Simplify right side
   156,253.16x = 19,242,764,905.28
5. Step 5: Solve for x
   x = 19,242,764,905.28/156,253.16
6. Step 6: Final answer
   x = 123,151.20