Finding the Fourth Proportional to 1,580.96, 2,181.86 and 872.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,580.96 : 2,181.86 = 872.93 : x
2. Step 2: Convert to fraction form
   1,580.96/2,181.86 = 872.93/x
3. Step 3: Cross multiply
   1,580.96x = 2,181.86 × 872.93
4. Step 4: Simplify right side
   1,580.96x = 1,904,602.32
5. Step 5: Solve for x
   x = 1,904,602.32/1,580.96
6. Step 6: Final answer
   x = 1,204.72