Finding the Fourth Proportional to 1,359.90, 1,875.90 and 887.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.90 : 1,875.90 = 887.12 : x
2. Step 2: Convert to fraction form
   1,359.90/1,875.90 = 887.12/x
3. Step 3: Cross multiply
   1,359.90x = 1,875.90 × 887.12
4. Step 4: Simplify right side
   1,359.90x = 1,664,148.41
5. Step 5: Solve for x
   x = 1,664,148.41/1,359.90
6. Step 6: Final answer
   x = 1,223.73