Finding the Fourth Proportional to 11,809.60, 16,279.20 and 7,612.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,809.60 : 16,279.20 = 7,612.48 : x
2. Step 2: Convert to fraction form
   11,809.60/16,279.20 = 7,612.48/x
3. Step 3: Cross multiply
   11,809.60x = 16,279.20 × 7,612.48
4. Step 4: Simplify right side
   11,809.60x = 123,925,084.42
5. Step 5: Solve for x
   x = 123,925,084.42/11,809.60
6. Step 6: Final answer
   x = 10,493.59