Finding the Fourth Proportional to 56,899.88, 78,521.78 and 31,749.38

Step by Step Solution

1. Step 1: Write the proportion equation
   56,899.88 : 78,521.78 = 31,749.38 : x
2. Step 2: Convert to fraction form
   56,899.88/78,521.78 = 31,749.38/x
3. Step 3: Cross multiply
   56,899.88x = 78,521.78 × 31,749.38
4. Step 4: Simplify right side
   56,899.88x = 2,493,017,831.50
5. Step 5: Solve for x
   x = 2,493,017,831.50/56,899.88
6. Step 6: Final answer
   x = 43,814.11