Finding the Fourth Proportional to 3,809.31, 5,716.34 and 3,777.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,809.31 : 5,716.34 = 3,777.99 : x
2. Step 2: Convert to fraction form
   3,809.31/5,716.34 = 3,777.99/x
3. Step 3: Cross multiply
   3,809.31x = 5,716.34 × 3,777.99
4. Step 4: Simplify right side
   3,809.31x = 21,596,256.47
5. Step 5: Solve for x
   x = 21,596,256.47/3,809.31
6. Step 6: Final answer
   x = 5,669.34