Finding the Fourth Proportional to 56,878.88, 78,492.33 and 31,385.48

Step by Step Solution

1. Step 1: Write the proportion equation
   56,878.88 : 78,492.33 = 31,385.48 : x
2. Step 2: Convert to fraction form
   56,878.88/78,492.33 = 31,385.48/x
3. Step 3: Cross multiply
   56,878.88x = 78,492.33 × 31,385.48
4. Step 4: Simplify right side
   56,878.88x = 2,463,519,453.37
5. Step 5: Solve for x
   x = 2,463,519,453.37/56,878.88
6. Step 6: Final answer
   x = 43,311.67