Finding the Fourth Proportional to 12,886.82, 19,320.78 and 4,116.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886.82 : 19,320.78 = 4,116.68 : x
2. Step 2: Convert to fraction form
   12,886.82/19,320.78 = 4,116.68/x
3. Step 3: Cross multiply
   12,886.82x = 19,320.78 × 4,116.68
4. Step 4: Simplify right side
   12,886.82x = 79,537,468.61
5. Step 5: Solve for x
   x = 79,537,468.61/12,886.82
6. Step 6: Final answer
   x = 6,172.00