Finding the Fourth Proportional to 1,587.58, 2,189.76 and 1,116.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.58 : 2,189.76 = 1,116.46 : x
2. Step 2: Convert to fraction form
   1,587.58/2,189.76 = 1,116.46/x
3. Step 3: Cross multiply
   1,587.58x = 2,189.76 × 1,116.46
4. Step 4: Simplify right side
   1,587.58x = 2,444,779.45
5. Step 5: Solve for x
   x = 2,444,779.45/1,587.58
6. Step 6: Final answer
   x = 1,539.94