Finding the Fourth Proportional to 56,810, 78,315.82 and 39,761.48

Step by Step Solution

1. Step 1: Write the proportion equation
   56,810 : 78,315.82 = 39,761.48 : x
2. Step 2: Convert to fraction form
   56,810/78,315.82 = 39,761.48/x
3. Step 3: Cross multiply
   56,810x = 78,315.82 × 39,761.48
4. Step 4: Simplify right side
   56,810x = 3,113,952,910.61
5. Step 5: Solve for x
   x = 3,113,952,910.61/56,810
6. Step 6: Final answer
   x = 54,813.46