Finding the Fourth Proportional to 1,987.31, 2,979.94 and 1,050.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.31 : 2,979.94 = 1,050.76 : x
2. Step 2: Convert to fraction form
   1,987.31/2,979.94 = 1,050.76/x
3. Step 3: Cross multiply
   1,987.31x = 2,979.94 × 1,050.76
4. Step 4: Simplify right side
   1,987.31x = 3,131,200.63
5. Step 5: Solve for x
   x = 3,131,200.63/1,987.31
6. Step 6: Final answer
   x = 1,575.60