Finding the Fourth Proportional to 28,502.82, 42,763.59 and 13,709.79

Step by Step Solution

1. Step 1: Write the proportion equation
   28,502.82 : 42,763.59 = 13,709.79 : x
2. Step 2: Convert to fraction form
   28,502.82/42,763.59 = 13,709.79/x
3. Step 3: Cross multiply
   28,502.82x = 42,763.59 × 13,709.79
4. Step 4: Simplify right side
   28,502.82x = 586,279,838.55
5. Step 5: Solve for x
   x = 586,279,838.55/28,502.82
6. Step 6: Final answer
   x = 20,569.19