Finding the Fourth Proportional to 188,720.72, 260,449.59 and 108,155.72

Step by Step Solution

1. Step 1: Write the proportion equation
   188,720.72 : 260,449.59 = 108,155.72 : x
2. Step 2: Convert to fraction form
   188,720.72/260,449.59 = 108,155.72/x
3. Step 3: Cross multiply
   188,720.72x = 260,449.59 × 108,155.72
4. Step 4: Simplify right side
   188,720.72x = 28,169,113,986.86
5. Step 5: Solve for x
   x = 28,169,113,986.86/188,720.72
6. Step 6: Final answer
   x = 149,263.49