Finding the Fourth Proportional to 1,075.63, 1,483.89 and 780.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.63 : 1,483.89 = 780.37 : x
2. Step 2: Convert to fraction form
   1,075.63/1,483.89 = 780.37/x
3. Step 3: Cross multiply
   1,075.63x = 1,483.89 × 780.37
4. Step 4: Simplify right side
   1,075.63x = 1,157,983.24
5. Step 5: Solve for x
   x = 1,157,983.24/1,075.63
6. Step 6: Final answer
   x = 1,076.56