Finding the Fourth Proportional to 91,230, 137,574.54 and 89,982.48

Step by Step Solution

1. Step 1: Write the proportion equation
   91,230 : 137,574.54 = 89,982.48 : x
2. Step 2: Convert to fraction form
   91,230/137,574.54 = 89,982.48/x
3. Step 3: Cross multiply
   91,230x = 137,574.54 × 89,982.48
4. Step 4: Simplify right side
   91,230x = 12,379,298,294.06
5. Step 5: Solve for x
   x = 12,379,298,294.06/91,230
6. Step 6: Final answer
   x = 135,693.28