Finding the Fourth Proportional to 12,980.50, 17,913.09 and 7,092.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980.50 : 17,913.09 = 7,092.50 : x
2. Step 2: Convert to fraction form
   12,980.50/17,913.09 = 7,092.50/x
3. Step 3: Cross multiply
   12,980.50x = 17,913.09 × 7,092.50
4. Step 4: Simplify right side
   12,980.50x = 127,048,590.83
5. Step 5: Solve for x
   x = 127,048,590.83/12,980.50
6. Step 6: Final answer
   x = 9,787.65