Finding the Fourth Proportional to 1,401.60, 1,893.60 and 1,401.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.60 : 1,893.60 = 1,401.60 : x
2. Step 2: Convert to fraction form
   1,401.60/1,893.60 = 1,401.60/x
3. Step 3: Cross multiply
   1,401.60x = 1,893.60 × 1,401.60
4. Step 4: Simplify right side
   1,401.60x = 2,654,069.76
5. Step 5: Solve for x
   x = 2,654,069.76/1,401.60
6. Step 6: Final answer
   x = 1,893.60