Finding the Fourth Proportional to 1,401.45, 2,109.30 and 1,056.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.45 : 2,109.30 = 1,056.53 : x
2. Step 2: Convert to fraction form
   1,401.45/2,109.30 = 1,056.53/x
3. Step 3: Cross multiply
   1,401.45x = 2,109.30 × 1,056.53
4. Step 4: Simplify right side
   1,401.45x = 2,228,528.18
5. Step 5: Solve for x
   x = 2,228,528.18/1,401.45
6. Step 6: Final answer
   x = 1,590.16