Finding the Fourth Proportional to 1,445.15, 1,994.30 and 782.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.15 : 1,994.30 = 782.00 : x
2. Step 2: Convert to fraction form
   1,445.15/1,994.30 = 782.00/x
3. Step 3: Cross multiply
   1,445.15x = 1,994.30 × 782.00
4. Step 4: Simplify right side
   1,445.15x = 1,559,532.63
5. Step 5: Solve for x
   x = 1,559,532.63/1,445.15
6. Step 6: Final answer
   x = 1,079.15