Finding the Fourth Proportional to 8,973.93, 12,390.12 and 5,618.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,973.93 : 12,390.12 = 5,618.10 : x
2. Step 2: Convert to fraction form
   8,973.93/12,390.12 = 5,618.10/x
3. Step 3: Cross multiply
   8,973.93x = 12,390.12 × 5,618.10
4. Step 4: Simplify right side
   8,973.93x = 69,608,933.17
5. Step 5: Solve for x
   x = 69,608,933.17/8,973.93
6. Step 6: Final answer
   x = 7,756.79