Finding the Fourth Proportional to 10,061.76, 13,898.60 and 8,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,061.76 : 13,898.60 = 8,388.72 : x
2. Step 2: Convert to fraction form
   10,061.76/13,898.60 = 8,388.72/x
3. Step 3: Cross multiply
   10,061.76x = 13,898.60 × 8,388.72
4. Step 4: Simplify right side
   10,061.76x = 116,591,463.79
5. Step 5: Solve for x
   x = 116,591,463.79/10,061.76
6. Step 6: Final answer
   x = 11,587.58