Finding the Fourth Proportional to 89,870.78, 134,794.42 and 26,689.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,870.78 : 134,794.42 = 26,689.60 : x
2. Step 2: Convert to fraction form
   89,870.78/134,794.42 = 26,689.60/x
3. Step 3: Cross multiply
   89,870.78x = 134,794.42 × 26,689.60
4. Step 4: Simplify right side
   89,870.78x = 3,597,609,152.03
5. Step 5: Solve for x
   x = 3,597,609,152.03/89,870.78
6. Step 6: Final answer
   x = 40,030.91