Finding the Fourth Proportional to 89,438.10, 134,003.55 and 58,257.30

Step by Step Solution

1. Step 1: Write the proportion equation
   89,438.10 : 134,003.55 = 58,257.30 : x
2. Step 2: Convert to fraction form
   89,438.10/134,003.55 = 58,257.30/x
3. Step 3: Cross multiply
   89,438.10x = 134,003.55 × 58,257.30
4. Step 4: Simplify right side
   89,438.10x = 7,806,685,013.42
5. Step 5: Solve for x
   x = 7,806,685,013.42/89,438.10
6. Step 6: Final answer
   x = 87,285.90