Finding the Fourth Proportional to 103,510.50, 154,497.83 and 89,217.78

Step by Step Solution

1. Step 1: Write the proportion equation
   103,510.50 : 154,497.83 = 89,217.78 : x
2. Step 2: Convert to fraction form
   103,510.50/154,497.83 = 89,217.78/x
3. Step 3: Cross multiply
   103,510.50x = 154,497.83 × 89,217.78
4. Step 4: Simplify right side
   103,510.50x = 13,783,953,407.42
5. Step 5: Solve for x
   x = 13,783,953,407.42/103,510.50
6. Step 6: Final answer
   x = 133,164.78