Finding the Fourth Proportional to 10,188.61, 15,279.72 and 3,948.19

Step by Step Solution

1. Step 1: Write the proportion equation
   10,188.61 : 15,279.72 = 3,948.19 : x
2. Step 2: Convert to fraction form
   10,188.61/15,279.72 = 3,948.19/x
3. Step 3: Cross multiply
   10,188.61x = 15,279.72 × 3,948.19
4. Step 4: Simplify right side
   10,188.61x = 60,327,237.71
5. Step 5: Solve for x
   x = 60,327,237.71/10,188.61
6. Step 6: Final answer
   x = 5,921.05