Finding the Fourth Proportional to 28,059.88, 42,088.12 and 10,528.24

Step by Step Solution

1. Step 1: Write the proportion equation
   28,059.88 : 42,088.12 = 10,528.24 : x
2. Step 2: Convert to fraction form
   28,059.88/42,088.12 = 10,528.24/x
3. Step 3: Cross multiply
   28,059.88x = 42,088.12 × 10,528.24
4. Step 4: Simplify right side
   28,059.88x = 443,113,828.51
5. Step 5: Solve for x
   x = 443,113,828.51/28,059.88
6. Step 6: Final answer
   x = 15,791.72