Finding the Fourth Proportional to 1,406.32, 2,105.04 and 788.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.32 : 2,105.04 = 788.56 : x
2. Step 2: Convert to fraction form
   1,406.32/2,105.04 = 788.56/x
3. Step 3: Cross multiply
   1,406.32x = 2,105.04 × 788.56
4. Step 4: Simplify right side
   1,406.32x = 1,659,950.34
5. Step 5: Solve for x
   x = 1,659,950.34/1,406.32
6. Step 6: Final answer
   x = 1,180.35