Finding the Fourth Proportional to 1,401.90, 1,931.05 and 1,069.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.90 : 1,931.05 = 1,069.75 : x
2. Step 2: Convert to fraction form
   1,401.90/1,931.05 = 1,069.75/x
3. Step 3: Cross multiply
   1,401.90x = 1,931.05 × 1,069.75
4. Step 4: Simplify right side
   1,401.90x = 2,065,740.74
5. Step 5: Solve for x
   x = 2,065,740.74/1,401.90
6. Step 6: Final answer
   x = 1,473.53