Finding the Fourth Proportional to 10,300.90, 15,456.15 and 7,708.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,300.90 : 15,456.15 = 7,708.90 : x
2. Step 2: Convert to fraction form
   10,300.90/15,456.15 = 7,708.90/x
3. Step 3: Cross multiply
   10,300.90x = 15,456.15 × 7,708.90
4. Step 4: Simplify right side
   10,300.90x = 119,149,914.74
5. Step 5: Solve for x
   x = 119,149,914.74/10,300.90
6. Step 6: Final answer
   x = 11,566.94