Finding the Fourth Proportional to 21,619.39, 32,432.98 and 9,778.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,619.39 : 32,432.98 = 9,778.76 : x
2. Step 2: Convert to fraction form
   21,619.39/32,432.98 = 9,778.76/x
3. Step 3: Cross multiply
   21,619.39x = 32,432.98 × 9,778.76
4. Step 4: Simplify right side
   21,619.39x = 317,154,140.89
5. Step 5: Solve for x
   x = 317,154,140.89/21,619.39
6. Step 6: Final answer
   x = 14,669.89