Finding the Fourth Proportional to 8,913.60, 12,300.42 and 5,376.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,913.60 : 12,300.42 = 5,376.18 : x
2. Step 2: Convert to fraction form
   8,913.60/12,300.42 = 5,376.18/x
3. Step 3: Cross multiply
   8,913.60x = 12,300.42 × 5,376.18
4. Step 4: Simplify right side
   8,913.60x = 66,129,272.00
5. Step 5: Solve for x
   x = 66,129,272.00/8,913.60
6. Step 6: Final answer
   x = 7,418.92