Finding the Fourth Proportional to 5,131.71, 7,081.77 and 2,773.86

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.71 : 7,081.77 = 2,773.86 : x
2. Step 2: Convert to fraction form
   5,131.71/7,081.77 = 2,773.86/x
3. Step 3: Cross multiply
   5,131.71x = 7,081.77 × 2,773.86
4. Step 4: Simplify right side
   5,131.71x = 19,643,838.53
5. Step 5: Solve for x
   x = 19,643,838.53/5,131.71
6. Step 6: Final answer
   x = 3,827.93