Finding the Fourth Proportional to 56,627.39, 78,146.76 and 31,134.80

Step by Step Solution

1. Step 1: Write the proportion equation
   56,627.39 : 78,146.76 = 31,134.80 : x
2. Step 2: Convert to fraction form
   56,627.39/78,146.76 = 31,134.80/x
3. Step 3: Cross multiply
   56,627.39x = 78,146.76 × 31,134.80
4. Step 4: Simplify right side
   56,627.39x = 2,433,083,352.51
5. Step 5: Solve for x
   x = 2,433,083,352.51/56,627.39
6. Step 6: Final answer
   x = 42,966.55