Finding the Fourth Proportional to 9,919.79, 14,886.87 and 3,680.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.79 : 14,886.87 = 3,680.69 : x
2. Step 2: Convert to fraction form
   9,919.79/14,886.87 = 3,680.69/x
3. Step 3: Cross multiply
   9,919.79x = 14,886.87 × 3,680.69
4. Step 4: Simplify right side
   9,919.79x = 54,793,916.32
5. Step 5: Solve for x
   x = 54,793,916.32/9,919.79
6. Step 6: Final answer
   x = 5,523.70