Finding the Fourth Proportional to 112,909.85, 155,804.37 and 65,178.58

Step by Step Solution

1. Step 1: Write the proportion equation
   112,909.85 : 155,804.37 = 65,178.58 : x
2. Step 2: Convert to fraction form
   112,909.85/155,804.37 = 65,178.58/x
3. Step 3: Cross multiply
   112,909.85x = 155,804.37 × 65,178.58
4. Step 4: Simplify right side
   112,909.85x = 10,155,107,041.94
5. Step 5: Solve for x
   x = 10,155,107,041.94/112,909.85
6. Step 6: Final answer
   x = 89,939.95