Finding the Fourth Proportional to 1,911.47, 2,637.83 and 1,115.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,911.47 : 2,637.83 = 1,115.34 : x
2. Step 2: Convert to fraction form
   1,911.47/2,637.83 = 1,115.34/x
3. Step 3: Cross multiply
   1,911.47x = 2,637.83 × 1,115.34
4. Step 4: Simplify right side
   1,911.47x = 2,942,080.10
5. Step 5: Solve for x
   x = 2,942,080.10/1,911.47
6. Step 6: Final answer
   x = 1,539.17