Finding the Fourth Proportional to 1,047.50, 1,445.61 and 692.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.50 : 1,445.61 = 692.80 : x
2. Step 2: Convert to fraction form
   1,047.50/1,445.61 = 692.80/x
3. Step 3: Cross multiply
   1,047.50x = 1,445.61 × 692.80
4. Step 4: Simplify right side
   1,047.50x = 1,001,521.66
5. Step 5: Solve for x
   x = 1,001,521.66/1,047.50
6. Step 6: Final answer
   x = 956.11