Finding the Fourth Proportional to 156,425.72, 215,858.82 and 88,438.37

Step by Step Solution

1. Step 1: Write the proportion equation
   156,425.72 : 215,858.82 = 88,438.37 : x
2. Step 2: Convert to fraction form
   156,425.72/215,858.82 = 88,438.37/x
3. Step 3: Cross multiply
   156,425.72x = 215,858.82 × 88,438.37
4. Step 4: Simplify right side
   156,425.72x = 19,090,201,443.27
5. Step 5: Solve for x
   x = 19,090,201,443.27/156,425.72
6. Step 6: Final answer
   x = 122,040.05