Finding the Fourth Proportional to 12,820.50, 19,239.39 and 4,612.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.50 : 19,239.39 = 4,612.50 : x
2. Step 2: Convert to fraction form
   12,820.50/19,239.39 = 4,612.50/x
3. Step 3: Cross multiply
   12,820.50x = 19,239.39 × 4,612.50
4. Step 4: Simplify right side
   12,820.50x = 88,741,686.38
5. Step 5: Solve for x
   x = 88,741,686.38/12,820.50
6. Step 6: Final answer
   x = 6,921.86