Finding the Fourth Proportional to 112,909.60, 155,804.02 and 65,178.33

Step by Step Solution

1. Step 1: Write the proportion equation
   112,909.60 : 155,804.02 = 65,178.33 : x
2. Step 2: Convert to fraction form
   112,909.60/155,804.02 = 65,178.33/x
3. Step 3: Cross multiply
   112,909.60x = 155,804.02 × 65,178.33
4. Step 4: Simplify right side
   112,909.60x = 10,155,045,450.30
5. Step 5: Solve for x
   x = 10,155,045,450.30/112,909.60
6. Step 6: Final answer
   x = 89,939.61