Finding the Fourth Proportional to 9,389.95, 12,959.30 and 5,613.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.95 : 12,959.30 = 5,613.12 : x
2. Step 2: Convert to fraction form
   9,389.95/12,959.30 = 5,613.12/x
3. Step 3: Cross multiply
   9,389.95x = 12,959.30 × 5,613.12
4. Step 4: Simplify right side
   9,389.95x = 72,742,120.05
5. Step 5: Solve for x
   x = 72,742,120.05/9,389.95
6. Step 6: Final answer
   x = 7,746.81