Finding the Fourth Proportional to 56,627.45, 78,147.38 and 31,134.88

Step by Step Solution

1. Step 1: Write the proportion equation
   56,627.45 : 78,147.38 = 31,134.88 : x
2. Step 2: Convert to fraction form
   56,627.45/78,147.38 = 31,134.88/x
3. Step 3: Cross multiply
   56,627.45x = 78,147.38 × 31,134.88
4. Step 4: Simplify right side
   56,627.45x = 2,433,108,752.20
5. Step 5: Solve for x
   x = 2,433,108,752.20/56,627.45
6. Step 6: Final answer
   x = 42,966.95