Finding the Fourth Proportional to 103,638.30, 155,227.05 and 89,814.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,638.30 : 155,227.05 = 89,814.30 : x
2. Step 2: Convert to fraction form
   103,638.30/155,227.05 = 89,814.30/x
3. Step 3: Cross multiply
   103,638.30x = 155,227.05 × 89,814.30
4. Step 4: Simplify right side
   103,638.30x = 13,941,608,836.82
5. Step 5: Solve for x
   x = 13,941,608,836.82/103,638.30
6. Step 6: Final answer
   x = 134,521.78