Finding the Fourth Proportional to 1,860.50, 2,790.72 and 706.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,860.50 : 2,790.72 = 706.25 : x
2. Step 2: Convert to fraction form
   1,860.50/2,790.72 = 706.25/x
3. Step 3: Cross multiply
   1,860.50x = 2,790.72 × 706.25
4. Step 4: Simplify right side
   1,860.50x = 1,970,952.98
5. Step 5: Solve for x
   x = 1,970,952.98/1,860.50
6. Step 6: Final answer
   x = 1,059.37