Finding the Fourth Proportional to 2,783.30, 4,175.51 and 1,139.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.30 : 4,175.51 = 1,139.98 : x
2. Step 2: Convert to fraction form
   2,783.30/4,175.51 = 1,139.98/x
3. Step 3: Cross multiply
   2,783.30x = 4,175.51 × 1,139.98
4. Step 4: Simplify right side
   2,783.30x = 4,759,997.89
5. Step 5: Solve for x
   x = 4,759,997.89/2,783.30
6. Step 6: Final answer
   x = 1,710.20