Finding the Fourth Proportional to 89,611, 134,439.55 and 26,428.57

Step by Step Solution

1. Step 1: Write the proportion equation
   89,611 : 134,439.55 = 26,428.57 : x
2. Step 2: Convert to fraction form
   89,611/134,439.55 = 26,428.57/x
3. Step 3: Cross multiply
   89,611x = 134,439.55 × 26,428.57
4. Step 4: Simplify right side
   89,611x = 3,553,045,057.94
5. Step 5: Solve for x
   x = 3,553,045,057.94/89,611
6. Step 6: Final answer
   x = 39,649.65