Finding the Fourth Proportional to 1,587.33, 2,191.46 and 1,056.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.33 : 2,191.46 = 1,056.96 : x
2. Step 2: Convert to fraction form
   1,587.33/2,191.46 = 1,056.96/x
3. Step 3: Cross multiply
   1,587.33x = 2,191.46 × 1,056.96
4. Step 4: Simplify right side
   1,587.33x = 2,316,280.28
5. Step 5: Solve for x
   x = 2,316,280.28/1,587.33
6. Step 6: Final answer
   x = 1,459.23