Finding the Fourth Proportional to 154,216.66, 231,060.72 and 103,520.78

Step by Step Solution

1. Step 1: Write the proportion equation
   154,216.66 : 231,060.72 = 103,520.78 : x
2. Step 2: Convert to fraction form
   154,216.66/231,060.72 = 103,520.78/x
3. Step 3: Cross multiply
   154,216.66x = 231,060.72 × 103,520.78
4. Step 4: Simplify right side
   154,216.66x = 23,919,585,961.76
5. Step 5: Solve for x
   x = 23,919,585,961.76/154,216.66
6. Step 6: Final answer
   x = 155,103.77