Finding the Fourth Proportional to 1,145.33, 1,580.58 and 702.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.33 : 1,580.58 = 702.98 : x
2. Step 2: Convert to fraction form
   1,145.33/1,580.58 = 702.98/x
3. Step 3: Cross multiply
   1,145.33x = 1,580.58 × 702.98
4. Step 4: Simplify right side
   1,145.33x = 1,111,118.76
5. Step 5: Solve for x
   x = 1,111,118.76/1,145.33
6. Step 6: Final answer
   x = 970.13