Finding the Fourth Proportional to 137,105.25, 205,574.83 and 89,663.07

Step by Step Solution

1. Step 1: Write the proportion equation
   137,105.25 : 205,574.83 = 89,663.07 : x
2. Step 2: Convert to fraction form
   137,105.25/205,574.83 = 89,663.07/x
3. Step 3: Cross multiply
   137,105.25x = 205,574.83 × 89,663.07
4. Step 4: Simplify right side
   137,105.25x = 18,432,470,372.53
5. Step 5: Solve for x
   x = 18,432,470,372.53/137,105.25
6. Step 6: Final answer
   x = 134,440.30