Finding the Fourth Proportional to 1,985.50, 2,739.60 and 1,277.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.50 : 2,739.60 = 1,277.56 : x
2. Step 2: Convert to fraction form
   1,985.50/2,739.60 = 1,277.56/x
3. Step 3: Cross multiply
   1,985.50x = 2,739.60 × 1,277.56
4. Step 4: Simplify right side
   1,985.50x = 3,500,003.38
5. Step 5: Solve for x
   x = 3,500,003.38/1,985.50
6. Step 6: Final answer
   x = 1,762.78