Finding the Fourth Proportional to 28,231.47, 42,342.57 and 10,470.51

Step by Step Solution

1. Step 1: Write the proportion equation
   28,231.47 : 42,342.57 = 10,470.51 : x
2. Step 2: Convert to fraction form
   28,231.47/42,342.57 = 10,470.51/x
3. Step 3: Cross multiply
   28,231.47x = 42,342.57 × 10,470.51
4. Step 4: Simplify right side
   28,231.47x = 443,348,302.61
5. Step 5: Solve for x
   x = 443,348,302.61/28,231.47
6. Step 6: Final answer
   x = 15,704.05