Finding the Fourth Proportional to 1,410.03, 1,945.76 and 780.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.03 : 1,945.76 = 780.39 : x
2. Step 2: Convert to fraction form
   1,410.03/1,945.76 = 780.39/x
3. Step 3: Cross multiply
   1,410.03x = 1,945.76 × 780.39
4. Step 4: Simplify right side
   1,410.03x = 1,518,447.74
5. Step 5: Solve for x
   x = 1,518,447.74/1,410.03
6. Step 6: Final answer
   x = 1,076.89