Finding the Fourth Proportional to 56,899.59, 78,521.01 and 31,405.95

Step by Step Solution

1. Step 1: Write the proportion equation
   56,899.59 : 78,521.01 = 31,405.95 : x
2. Step 2: Convert to fraction form
   56,899.59/78,521.01 = 31,405.95/x
3. Step 3: Cross multiply
   56,899.59x = 78,521.01 × 31,405.95
4. Step 4: Simplify right side
   56,899.59x = 2,466,026,914.01
5. Step 5: Solve for x
   x = 2,466,026,914.01/56,899.59
6. Step 6: Final answer
   x = 43,339.98