Finding the Fourth Proportional to 56,627.75, 78,146.35 and 31,134.55

Step by Step Solution

1. Step 1: Write the proportion equation
   56,627.75 : 78,146.35 = 31,134.55 : x
2. Step 2: Convert to fraction form
   56,627.75/78,146.35 = 31,134.55/x
3. Step 3: Cross multiply
   56,627.75x = 78,146.35 × 31,134.55
4. Step 4: Simplify right side
   56,627.75x = 2,433,051,441.39
5. Step 5: Solve for x
   x = 2,433,051,441.39/56,627.75
6. Step 6: Final answer
   x = 42,965.71