Finding the Fourth Proportional to 12,279.67, 18,420.66 and 3,395.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,279.67 : 18,420.66 = 3,395.59 : x
2. Step 2: Convert to fraction form
   12,279.67/18,420.66 = 3,395.59/x
3. Step 3: Cross multiply
   12,279.67x = 18,420.66 × 3,395.59
4. Step 4: Simplify right side
   12,279.67x = 62,549,008.89
5. Step 5: Solve for x
   x = 62,549,008.89/12,279.67
6. Step 6: Final answer
   x = 5,093.70