Finding the Fourth Proportional to 112,909.88, 155,804.41 and 65,178.61

Step by Step Solution

1. Step 1: Write the proportion equation
   112,909.88 : 155,804.41 = 65,178.61 : x
2. Step 2: Convert to fraction form
   112,909.88/155,804.41 = 65,178.61/x
3. Step 3: Cross multiply
   112,909.88x = 155,804.41 × 65,178.61
4. Step 4: Simplify right side
   112,909.88x = 10,155,114,567.63
5. Step 5: Solve for x
   x = 10,155,114,567.63/112,909.88
6. Step 6: Final answer
   x = 89,940.00