Finding the Fourth Proportional to 9,263.45, 12,781.56 and 5,487.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,263.45 : 12,781.56 = 5,487.79 : x
2. Step 2: Convert to fraction form
   9,263.45/12,781.56 = 5,487.79/x
3. Step 3: Cross multiply
   9,263.45x = 12,781.56 × 5,487.79
4. Step 4: Simplify right side
   9,263.45x = 70,142,517.15
5. Step 5: Solve for x
   x = 70,142,517.15/9,263.45
6. Step 6: Final answer
   x = 7,571.96