Finding the Fourth Proportional to 1,307.05, 1,806.60 and 1,148.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,307.05 : 1,806.60 = 1,148.50 : x
2. Step 2: Convert to fraction form
   1,307.05/1,806.60 = 1,148.50/x
3. Step 3: Cross multiply
   1,307.05x = 1,806.60 × 1,148.50
4. Step 4: Simplify right side
   1,307.05x = 2,074,876.50
5. Step 5: Solve for x
   x = 2,074,876.50/1,307.05
6. Step 6: Final answer
   x = 1,587.45