Finding the Fourth Proportional to 28,298.71, 42,392.03 and 19,392.15

Step by Step Solution

1. Step 1: Write the proportion equation
   28,298.71 : 42,392.03 = 19,392.15 : x
2. Step 2: Convert to fraction form
   28,298.71/42,392.03 = 19,392.15/x
3. Step 3: Cross multiply
   28,298.71x = 42,392.03 × 19,392.15
4. Step 4: Simplify right side
   28,298.71x = 822,072,666.57
5. Step 5: Solve for x
   x = 822,072,666.57/28,298.71
6. Step 6: Final answer
   x = 29,049.83