Finding the Fourth Proportional to 12,928.95, 17,848.71 and 8,702.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,928.95 : 17,848.71 = 8,702.23 : x
2. Step 2: Convert to fraction form
   12,928.95/17,848.71 = 8,702.23/x
3. Step 3: Cross multiply
   12,928.95x = 17,848.71 × 8,702.23
4. Step 4: Simplify right side
   12,928.95x = 155,323,579.62
5. Step 5: Solve for x
   x = 155,323,579.62/12,928.95
6. Step 6: Final answer
   x = 12,013.63