Finding the Fourth Proportional to 10,342.96, 15,518.20 and 5,077.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,342.96 : 15,518.20 = 5,077.42 : x
2. Step 2: Convert to fraction form
   10,342.96/15,518.20 = 5,077.42/x
3. Step 3: Cross multiply
   10,342.96x = 15,518.20 × 5,077.42
4. Step 4: Simplify right side
   10,342.96x = 78,792,341.45
5. Step 5: Solve for x
   x = 78,792,341.45/10,342.96
6. Step 6: Final answer
   x = 7,617.97