Finding the Fourth Proportional to 56,627.40, 78,146.72 and 31,134.84

Step by Step Solution

1. Step 1: Write the proportion equation
   56,627.40 : 78,146.72 = 31,134.84 : x
2. Step 2: Convert to fraction form
   56,627.40/78,146.72 = 31,134.84/x
3. Step 3: Cross multiply
   56,627.40x = 78,146.72 × 31,134.84
4. Step 4: Simplify right side
   56,627.40x = 2,433,085,623.72
5. Step 5: Solve for x
   x = 2,433,085,623.72/56,627.40
6. Step 6: Final answer
   x = 42,966.58