Finding the Fourth Proportional to 1,099.98, 1,506.74 and 1,085.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.98 : 1,506.74 = 1,085.94 : x
2. Step 2: Convert to fraction form
   1,099.98/1,506.74 = 1,085.94/x
3. Step 3: Cross multiply
   1,099.98x = 1,506.74 × 1,085.94
4. Step 4: Simplify right side
   1,099.98x = 1,636,223.81
5. Step 5: Solve for x
   x = 1,636,223.81/1,099.98
6. Step 6: Final answer
   x = 1,487.50