Finding the Fourth Proportional to 28,068.88, 42,107.76 and 10,540.04

Step by Step Solution

1. Step 1: Write the proportion equation
   28,068.88 : 42,107.76 = 10,540.04 : x
2. Step 2: Convert to fraction form
   28,068.88/42,107.76 = 10,540.04/x
3. Step 3: Cross multiply
   28,068.88x = 42,107.76 × 10,540.04
4. Step 4: Simplify right side
   28,068.88x = 443,817,474.71
5. Step 5: Solve for x
   x = 443,817,474.71/28,068.88
6. Step 6: Final answer
   x = 15,811.73