Finding the Fourth Proportional to 156,978.96, 235,616.42 and 57,235.56

Step by Step Solution

1. Step 1: Write the proportion equation
   156,978.96 : 235,616.42 = 57,235.56 : x
2. Step 2: Convert to fraction form
   156,978.96/235,616.42 = 57,235.56/x
3. Step 3: Cross multiply
   156,978.96x = 235,616.42 × 57,235.56
4. Step 4: Simplify right side
   156,978.96x = 13,485,637,743.90
5. Step 5: Solve for x
   x = 13,485,637,743.90/156,978.96
6. Step 6: Final answer
   x = 85,907.29