Finding the Fourth Proportional to 9,398.95, 12,961.62 and 5,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,398.95 : 12,961.62 = 5,621.50 : x
2. Step 2: Convert to fraction form
   9,398.95/12,961.62 = 5,621.50/x
3. Step 3: Cross multiply
   9,398.95x = 12,961.62 × 5,621.50
4. Step 4: Simplify right side
   9,398.95x = 72,863,746.83
5. Step 5: Solve for x
   x = 72,863,746.83/9,398.95
6. Step 6: Final answer
   x = 7,752.33