Finding the Fourth Proportional to 1,019.60, 1,528.72 and 370.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.60 : 1,528.72 = 370.34 : x
2. Step 2: Convert to fraction form
   1,019.60/1,528.72 = 370.34/x
3. Step 3: Cross multiply
   1,019.60x = 1,528.72 × 370.34
4. Step 4: Simplify right side
   1,019.60x = 566,137.60
5. Step 5: Solve for x
   x = 566,137.60/1,019.60
6. Step 6: Final answer
   x = 555.26