Finding the Fourth Proportional to 1,580.69, 2,181.04 and 1,345.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,580.69 : 2,181.04 = 1,345.52 : x
2. Step 2: Convert to fraction form
   1,580.69/2,181.04 = 1,345.52/x
3. Step 3: Cross multiply
   1,580.69x = 2,181.04 × 1,345.52
4. Step 4: Simplify right side
   1,580.69x = 2,934,618.67
5. Step 5: Solve for x
   x = 2,934,618.67/1,580.69
6. Step 6: Final answer
   x = 1,856.55