Finding the Fourth Proportional to 8,702.82, 12,009.60 and 5,164.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,702.82 : 12,009.60 = 5,164.02 : x
2. Step 2: Convert to fraction form
   8,702.82/12,009.60 = 5,164.02/x
3. Step 3: Cross multiply
   8,702.82x = 12,009.60 × 5,164.02
4. Step 4: Simplify right side
   8,702.82x = 62,017,814.59
5. Step 5: Solve for x
   x = 62,017,814.59/8,702.82
6. Step 6: Final answer
   x = 7,126.17