Finding the Fourth Proportional to 40,840.88, 56,185.43 and 39,091.28

Step by Step Solution

1. Step 1: Write the proportion equation
   40,840.88 : 56,185.43 = 39,091.28 : x
2. Step 2: Convert to fraction form
   40,840.88/56,185.43 = 39,091.28/x
3. Step 3: Cross multiply
   40,840.88x = 56,185.43 × 39,091.28
4. Step 4: Simplify right side
   40,840.88x = 2,196,359,899.67
5. Step 5: Solve for x
   x = 2,196,359,899.67/40,840.88
6. Step 6: Final answer
   x = 53,778.47