Finding the Fourth Proportional to 12,379.86, 17,085.60 and 8,602.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,379.86 : 17,085.60 = 8,602.02 : x
2. Step 2: Convert to fraction form
   12,379.86/17,085.60 = 8,602.02/x
3. Step 3: Cross multiply
   12,379.86x = 17,085.60 × 8,602.02
4. Step 4: Simplify right side
   12,379.86x = 146,970,672.91
5. Step 5: Solve for x
   x = 146,970,672.91/12,379.86
6. Step 6: Final answer
   x = 11,871.76