Finding the Fourth Proportional to 1,994.79, 2,752.05 and 1,238.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,994.79 : 2,752.05 = 1,238.22 : x
2. Step 2: Convert to fraction form
   1,994.79/2,752.05 = 1,238.22/x
3. Step 3: Cross multiply
   1,994.79x = 2,752.05 × 1,238.22
4. Step 4: Simplify right side
   1,994.79x = 3,407,643.35
5. Step 5: Solve for x
   x = 3,407,643.35/1,994.79
6. Step 6: Final answer
   x = 1,708.27