Finding the Fourth Proportional to 1,445.19, 1,994.37 and 782.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.19 : 1,994.37 = 782.05 : x
2. Step 2: Convert to fraction form
   1,445.19/1,994.37 = 782.05/x
3. Step 3: Cross multiply
   1,445.19x = 1,994.37 × 782.05
4. Step 4: Simplify right side
   1,445.19x = 1,559,700.95
5. Step 5: Solve for x
   x = 1,559,700.95/1,445.19
6. Step 6: Final answer
   x = 1,079.24