Finding the Fourth Proportional to 1,445.03, 1,994.14 and 781.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.03 : 1,994.14 = 781.88 : x
2. Step 2: Convert to fraction form
   1,445.03/1,994.14 = 781.88/x
3. Step 3: Cross multiply
   1,445.03x = 1,994.14 × 781.88
4. Step 4: Simplify right side
   1,445.03x = 1,559,178.72
5. Step 5: Solve for x
   x = 1,559,178.72/1,445.03
6. Step 6: Final answer
   x = 1,078.99