Finding the Fourth Proportional to 1,075.78, 1,484.04 and 702.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.78 : 1,484.04 = 702.58 : x
2. Step 2: Convert to fraction form
   1,075.78/1,484.04 = 702.58/x
3. Step 3: Cross multiply
   1,075.78x = 1,484.04 × 702.58
4. Step 4: Simplify right side
   1,075.78x = 1,042,656.82
5. Step 5: Solve for x
   x = 1,042,656.82/1,075.78
6. Step 6: Final answer
   x = 969.21