Finding the Fourth Proportional to 1,085.06, 1,624.34 and 699.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.06 : 1,624.34 = 699.50 : x
2. Step 2: Convert to fraction form
   1,085.06/1,624.34 = 699.50/x
3. Step 3: Cross multiply
   1,085.06x = 1,624.34 × 699.50
4. Step 4: Simplify right side
   1,085.06x = 1,136,219.46
5. Step 5: Solve for x
   x = 1,136,219.46/1,085.06
6. Step 6: Final answer
   x = 1,047.15