Finding the Fourth Proportional to 56,806.47, 78,389.35 and 31,311.43

Step by Step Solution

1. Step 1: Write the proportion equation
   56,806.47 : 78,389.35 = 31,311.43 : x
2. Step 2: Convert to fraction form
   56,806.47/78,389.35 = 31,311.43/x
3. Step 3: Cross multiply
   56,806.47x = 78,389.35 × 31,311.43
4. Step 4: Simplify right side
   56,806.47x = 2,454,482,645.27
5. Step 5: Solve for x
   x = 2,454,482,645.27/56,806.47
6. Step 6: Final answer
   x = 43,207.80