Finding the Fourth Proportional to 137,808.34, 189,987.42 and 89,322.55

Step by Step Solution

1. Step 1: Write the proportion equation
   137,808.34 : 189,987.42 = 89,322.55 : x
2. Step 2: Convert to fraction form
   137,808.34/189,987.42 = 89,322.55/x
3. Step 3: Cross multiply
   137,808.34x = 189,987.42 × 89,322.55
4. Step 4: Simplify right side
   137,808.34x = 16,970,160,682.31
5. Step 5: Solve for x
   x = 16,970,160,682.31/137,808.34
6. Step 6: Final answer
   x = 123,143.21