Finding the Fourth Proportional to 10,354.48, 14,289 and 5,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,354.48 : 14,289 = 5,638.72 : x
2. Step 2: Convert to fraction form
   10,354.48/14,289 = 5,638.72/x
3. Step 3: Cross multiply
   10,354.48x = 14,289 × 5,638.72
4. Step 4: Simplify right side
   10,354.48x = 80,571,670.08
5. Step 5: Solve for x
   x = 80,571,670.08/10,354.48
6. Step 6: Final answer
   x = 7,781.33