Finding the Fourth Proportional to 12,710.76, 19,074.93 and 4,390.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,710.76 : 19,074.93 = 4,390.85 : x
2. Step 2: Convert to fraction form
   12,710.76/19,074.93 = 4,390.85/x
3. Step 3: Cross multiply
   12,710.76x = 19,074.93 × 4,390.85
4. Step 4: Simplify right side
   12,710.76x = 83,755,061.02
5. Step 5: Solve for x
   x = 83,755,061.02/12,710.76
6. Step 6: Final answer
   x = 6,589.30