Finding the Fourth Proportional to 137,172.58, 189,256.17 and 89,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   137,172.58 : 189,256.17 = 89,408.50 : x
2. Step 2: Convert to fraction form
   137,172.58/189,256.17 = 89,408.50/x
3. Step 3: Cross multiply
   137,172.58x = 189,256.17 × 89,408.50
4. Step 4: Simplify right side
   137,172.58x = 16,921,110,275.45
5. Step 5: Solve for x
   x = 16,921,110,275.45/137,172.58
6. Step 6: Final answer
   x = 123,356.36