Finding the Fourth Proportional to 7,662.39, 11,490.59 and 2,981.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,662.39 : 11,490.59 = 2,981.78 : x
2. Step 2: Convert to fraction form
   7,662.39/11,490.59 = 2,981.78/x
3. Step 3: Cross multiply
   7,662.39x = 11,490.59 × 2,981.78
4. Step 4: Simplify right side
   7,662.39x = 34,262,436.45
5. Step 5: Solve for x
   x = 34,262,436.45/7,662.39
6. Step 6: Final answer
   x = 4,471.51