Finding the Fourth Proportional to 1,987.50, 2,977.86 and 1,353.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.50 : 2,977.86 = 1,353.07 : x
2. Step 2: Convert to fraction form
   1,987.50/2,977.86 = 1,353.07/x
3. Step 3: Cross multiply
   1,987.50x = 2,977.86 × 1,353.07
4. Step 4: Simplify right side
   1,987.50x = 4,029,261.83
5. Step 5: Solve for x
   x = 4,029,261.83/1,987.50
6. Step 6: Final answer
   x = 2,027.30