Finding the Fourth Proportional to 67,642.02, 93,288.72 and 40,778.64

Step by Step Solution

1. Step 1: Write the proportion equation
   67,642.02 : 93,288.72 = 40,778.64 : x
2. Step 2: Convert to fraction form
   67,642.02/93,288.72 = 40,778.64/x
3. Step 3: Cross multiply
   67,642.02x = 93,288.72 × 40,778.64
4. Step 4: Simplify right side
   67,642.02x = 3,804,187,128.94
5. Step 5: Solve for x
   x = 3,804,187,128.94/67,642.02
6. Step 6: Final answer
   x = 56,240.00