Finding the Fourth Proportional to 56,296.72, 77,684.04 and 31,145.68

Step by Step Solution

1. Step 1: Write the proportion equation
   56,296.72 : 77,684.04 = 31,145.68 : x
2. Step 2: Convert to fraction form
   56,296.72/77,684.04 = 31,145.68/x
3. Step 3: Cross multiply
   56,296.72x = 77,684.04 × 31,145.68
4. Step 4: Simplify right side
   56,296.72x = 2,419,522,250.95
5. Step 5: Solve for x
   x = 2,419,522,250.95/56,296.72
6. Step 6: Final answer
   x = 42,978.03