Finding the Fourth Proportional to 1,069.96, 1,475.40 and 1,066.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.96 : 1,475.40 = 1,066.72 : x
2. Step 2: Convert to fraction form
   1,069.96/1,475.40 = 1,066.72/x
3. Step 3: Cross multiply
   1,069.96x = 1,475.40 × 1,066.72
4. Step 4: Simplify right side
   1,069.96x = 1,573,838.69
5. Step 5: Solve for x
   x = 1,573,838.69/1,069.96
6. Step 6: Final answer
   x = 1,470.93