Finding the Fourth Proportional to 137,555.29, 189,756.43 and 89,836.57

Step by Step Solution

1. Step 1: Write the proportion equation
   137,555.29 : 189,756.43 = 89,836.57 : x
2. Step 2: Convert to fraction form
   137,555.29/189,756.43 = 89,836.57/x
3. Step 3: Cross multiply
   137,555.29x = 189,756.43 × 89,836.57
4. Step 4: Simplify right side
   137,555.29x = 17,047,066,806.65
5. Step 5: Solve for x
   x = 17,047,066,806.65/137,555.29
6. Step 6: Final answer
   x = 123,928.83