Finding the Fourth Proportional to 1,528.17, 2,279.10 and 1,380.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.17 : 2,279.10 = 1,380.54 : x
2. Step 2: Convert to fraction form
   1,528.17/2,279.10 = 1,380.54/x
3. Step 3: Cross multiply
   1,528.17x = 2,279.10 × 1,380.54
4. Step 4: Simplify right side
   1,528.17x = 3,146,388.71
5. Step 5: Solve for x
   x = 3,146,388.71/1,528.17
6. Step 6: Final answer
   x = 2,058.93