Finding the Fourth Proportional to 2,053.76, 2,832.50 and 1,389.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,053.76 : 2,832.50 = 1,389.56 : x
2. Step 2: Convert to fraction form
   2,053.76/2,832.50 = 1,389.56/x
3. Step 3: Cross multiply
   2,053.76x = 2,832.50 × 1,389.56
4. Step 4: Simplify right side
   2,053.76x = 3,935,918.01
5. Step 5: Solve for x
   x = 3,935,918.01/2,053.76
6. Step 6: Final answer
   x = 1,916.45