Finding the Fourth Proportional to 56,367.39, 77,787 and 31,216.89

Step by Step Solution

1. Step 1: Write the proportion equation
   56,367.39 : 77,787 = 31,216.89 : x
2. Step 2: Convert to fraction form
   56,367.39/77,787 = 31,216.89/x
3. Step 3: Cross multiply
   56,367.39x = 77,787 × 31,216.89
4. Step 4: Simplify right side
   56,367.39x = 2,428,268,222.43
5. Step 5: Solve for x
   x = 2,428,268,222.43/56,367.39
6. Step 6: Final answer
   x = 43,079.31