Finding the Fourth Proportional to 89,498.56, 134,247.78 and 26,319.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,498.56 : 134,247.78 = 26,319.20 : x
2. Step 2: Convert to fraction form
   89,498.56/134,247.78 = 26,319.20/x
3. Step 3: Cross multiply
   89,498.56x = 134,247.78 × 26,319.20
4. Step 4: Simplify right side
   89,498.56x = 3,533,294,171.38
5. Step 5: Solve for x
   x = 3,533,294,171.38/89,498.56
6. Step 6: Final answer
   x = 39,478.78