Finding the Fourth Proportional to 3,663.39, 5,055.30 and 2,091.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663.39 : 5,055.30 = 2,091.99 : x
2. Step 2: Convert to fraction form
   3,663.39/5,055.30 = 2,091.99/x
3. Step 3: Cross multiply
   3,663.39x = 5,055.30 × 2,091.99
4. Step 4: Simplify right side
   3,663.39x = 10,575,637.05
5. Step 5: Solve for x
   x = 10,575,637.05/3,663.39
6. Step 6: Final answer
   x = 2,886.84