Finding the Fourth Proportional to 10,921.42, 16,385.62 and 3,901.29

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.42 : 16,385.62 = 3,901.29 : x
2. Step 2: Convert to fraction form
   10,921.42/16,385.62 = 3,901.29/x
3. Step 3: Cross multiply
   10,921.42x = 16,385.62 × 3,901.29
4. Step 4: Simplify right side
   10,921.42x = 63,925,055.45
5. Step 5: Solve for x
   x = 63,925,055.45/10,921.42
6. Step 6: Final answer
   x = 5,853.18