Finding the Fourth Proportional to 103,642.30, 155,233.05 and 89,818.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,642.30 : 155,233.05 = 89,818.30 : x
2. Step 2: Convert to fraction form
   103,642.30/155,233.05 = 89,818.30/x
3. Step 3: Cross multiply
   103,642.30x = 155,233.05 × 89,818.30
4. Step 4: Simplify right side
   103,642.30x = 13,942,768,654.82
5. Step 5: Solve for x
   x = 13,942,768,654.82/103,642.30
6. Step 6: Final answer
   x = 134,527.78