Finding the Fourth Proportional to 1,102.56, 1,643.70 and 1,050.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,102.56 : 1,643.70 = 1,050.72 : x
2. Step 2: Convert to fraction form
   1,102.56/1,643.70 = 1,050.72/x
3. Step 3: Cross multiply
   1,102.56x = 1,643.70 × 1,050.72
4. Step 4: Simplify right side
   1,102.56x = 1,727,068.46
5. Step 5: Solve for x
   x = 1,727,068.46/1,102.56
6. Step 6: Final answer
   x = 1,566.42