Finding the Fourth Proportional to 56,648.14, 78,172.89 and 31,154.52

Step by Step Solution

1. Step 1: Write the proportion equation
   56,648.14 : 78,172.89 = 31,154.52 : x
2. Step 2: Convert to fraction form
   56,648.14/78,172.89 = 31,154.52/x
3. Step 3: Cross multiply
   56,648.14x = 78,172.89 × 31,154.52
4. Step 4: Simplify right side
   56,648.14x = 2,435,438,864.96
5. Step 5: Solve for x
   x = 2,435,438,864.96/56,648.14
6. Step 6: Final answer
   x = 42,992.39