Finding the Fourth Proportional to 10,774.60, 14,910.42 and 10,515.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,774.60 : 14,910.42 = 10,515.40 : x
2. Step 2: Convert to fraction form
   10,774.60/14,910.42 = 10,515.40/x
3. Step 3: Cross multiply
   10,774.60x = 14,910.42 × 10,515.40
4. Step 4: Simplify right side
   10,774.60x = 156,789,030.47
5. Step 5: Solve for x
   x = 156,789,030.47/10,774.60
6. Step 6: Final answer
   x = 14,551.73