Finding the Fourth Proportional to 9,620.74, 13,280.15 and 5,645.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620.74 : 13,280.15 = 5,645.18 : x
2. Step 2: Convert to fraction form
   9,620.74/13,280.15 = 5,645.18/x
3. Step 3: Cross multiply
   9,620.74x = 13,280.15 × 5,645.18
4. Step 4: Simplify right side
   9,620.74x = 74,968,808.95
5. Step 5: Solve for x
   x = 74,968,808.95/9,620.74
6. Step 6: Final answer
   x = 7,792.42