Finding the Fourth Proportional to 9,864.52, 13,612.50 and 5,388.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,864.52 : 13,612.50 = 5,388.20 : x
2. Step 2: Convert to fraction form
   9,864.52/13,612.50 = 5,388.20/x
3. Step 3: Cross multiply
   9,864.52x = 13,612.50 × 5,388.20
4. Step 4: Simplify right side
   9,864.52x = 73,346,872.50
5. Step 5: Solve for x
   x = 73,346,872.50/9,864.52
6. Step 6: Final answer
   x = 7,435.42