Finding the Fourth Proportional to 9,921.71, 14,876.55 and 3,910.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,921.71 : 14,876.55 = 3,910.61 : x
2. Step 2: Convert to fraction form
   9,921.71/14,876.55 = 3,910.61/x
3. Step 3: Cross multiply
   9,921.71x = 14,876.55 × 3,910.61
4. Step 4: Simplify right side
   9,921.71x = 58,176,422.39
5. Step 5: Solve for x
   x = 58,176,422.39/9,921.71
6. Step 6: Final answer
   x = 5,863.55