Finding the Fourth Proportional to 137,559.60, 189,872.64 and 89,820.09

Step by Step Solution

1. Step 1: Write the proportion equation
   137,559.60 : 189,872.64 = 89,820.09 : x
2. Step 2: Convert to fraction form
   137,559.60/189,872.64 = 89,820.09/x
3. Step 3: Cross multiply
   137,559.60x = 189,872.64 × 89,820.09
4. Step 4: Simplify right side
   137,559.60x = 17,054,377,613.34
5. Step 5: Solve for x
   x = 17,054,377,613.34/137,559.60
6. Step 6: Final answer
   x = 123,978.10