Finding the Fourth Proportional to 12,707.12, 19,061.52 and 4,387.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,707.12 : 19,061.52 = 4,387.94 : x
2. Step 2: Convert to fraction form
   12,707.12/19,061.52 = 4,387.94/x
3. Step 3: Cross multiply
   12,707.12x = 19,061.52 × 4,387.94
4. Step 4: Simplify right side
   12,707.12x = 83,640,806.07
5. Step 5: Solve for x
   x = 83,640,806.07/12,707.12
6. Step 6: Final answer
   x = 6,582.20