Finding the Fourth Proportional to 12,978.98, 17,892.33 and 9,246.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978.98 : 17,892.33 = 9,246.50 : x
2. Step 2: Convert to fraction form
   12,978.98/17,892.33 = 9,246.50/x
3. Step 3: Cross multiply
   12,978.98x = 17,892.33 × 9,246.50
4. Step 4: Simplify right side
   12,978.98x = 165,441,429.35
5. Step 5: Solve for x
   x = 165,441,429.35/12,978.98
6. Step 6: Final answer
   x = 12,746.87