Finding the Fourth Proportional to 137,040.84, 189,147.96 and 89,210.88

Step by Step Solution

1. Step 1: Write the proportion equation
   137,040.84 : 189,147.96 = 89,210.88 : x
2. Step 2: Convert to fraction form
   137,040.84/189,147.96 = 89,210.88/x
3. Step 3: Cross multiply
   137,040.84x = 189,147.96 × 89,210.88
4. Step 4: Simplify right side
   137,040.84x = 16,874,055,961.80
5. Step 5: Solve for x
   x = 16,874,055,961.80/137,040.84
6. Step 6: Final answer
   x = 123,131.59