Finding the Fourth Proportional to 10,557.71, 15,838.82 and 3,894.23

Step by Step Solution

1. Step 1: Write the proportion equation
   10,557.71 : 15,838.82 = 3,894.23 : x
2. Step 2: Convert to fraction form
   10,557.71/15,838.82 = 3,894.23/x
3. Step 3: Cross multiply
   10,557.71x = 15,838.82 × 3,894.23
4. Step 4: Simplify right side
   10,557.71x = 61,680,008.01
5. Step 5: Solve for x
   x = 61,680,008.01/10,557.71
6. Step 6: Final answer
   x = 5,842.18