Finding the Fourth Proportional to 10,089.36, 15,131.61 and 4,242.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,089.36 : 15,131.61 = 4,242.78 : x
2. Step 2: Convert to fraction form
   10,089.36/15,131.61 = 4,242.78/x
3. Step 3: Cross multiply
   10,089.36x = 15,131.61 × 4,242.78
4. Step 4: Simplify right side
   10,089.36x = 64,200,092.28
5. Step 5: Solve for x
   x = 64,200,092.28/10,089.36
6. Step 6: Final answer
   x = 6,363.15