Finding the Fourth Proportional to 1,401.58, 2,100.21 and 887.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.58 : 2,100.21 = 887.50 : x
2. Step 2: Convert to fraction form
   1,401.58/2,100.21 = 887.50/x
3. Step 3: Cross multiply
   1,401.58x = 2,100.21 × 887.50
4. Step 4: Simplify right side
   1,401.58x = 1,863,936.38
5. Step 5: Solve for x
   x = 1,863,936.38/1,401.58
6. Step 6: Final answer
   x = 1,329.88