Finding the Fourth Proportional to 5,389.74, 8,085.82 and 2,926.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,389.74 : 8,085.82 = 2,926.80 : x
2. Step 2: Convert to fraction form
   5,389.74/8,085.82 = 2,926.80/x
3. Step 3: Cross multiply
   5,389.74x = 8,085.82 × 2,926.80
4. Step 4: Simplify right side
   5,389.74x = 23,665,577.98
5. Step 5: Solve for x
   x = 23,665,577.98/5,389.74
6. Step 6: Final answer
   x = 4,390.86