Finding the Fourth Proportional to 1,875.28, 2,813.64 and 1,320.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,875.28 : 2,813.64 = 1,320.52 : x
2. Step 2: Convert to fraction form
   1,875.28/2,813.64 = 1,320.52/x
3. Step 3: Cross multiply
   1,875.28x = 2,813.64 × 1,320.52
4. Step 4: Simplify right side
   1,875.28x = 3,715,467.89
5. Step 5: Solve for x
   x = 3,715,467.89/1,875.28
6. Step 6: Final answer
   x = 1,981.29