Finding the Fourth Proportional to 1,669.01, 2,300.78 and 1,313.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.01 : 2,300.78 = 1,313.79 : x
2. Step 2: Convert to fraction form
   1,669.01/2,300.78 = 1,313.79/x
3. Step 3: Cross multiply
   1,669.01x = 2,300.78 × 1,313.79
4. Step 4: Simplify right side
   1,669.01x = 3,022,742.58
5. Step 5: Solve for x
   x = 3,022,742.58/1,669.01
6. Step 6: Final answer
   x = 1,811.10