Finding the Fourth Proportional to 12,279.93, 18,406.78 and 7,003.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279.93 : 18,406.78 = 7,003.58 : x
2. Step 2: Convert to fraction form
   12,279.93/18,406.78 = 7,003.58/x
3. Step 3: Cross multiply
   12,279.93x = 18,406.78 × 7,003.58
4. Step 4: Simplify right side
   12,279.93x = 128,913,356.27
5. Step 5: Solve for x
   x = 128,913,356.27/12,279.93
6. Step 6: Final answer
   x = 10,497.89