Finding the Fourth Proportional to 1,107.72, 1,663.56 and 1,051.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.72 : 1,663.56 = 1,051.02 : x
2. Step 2: Convert to fraction form
   1,107.72/1,663.56 = 1,051.02/x
3. Step 3: Cross multiply
   1,107.72x = 1,663.56 × 1,051.02
4. Step 4: Simplify right side
   1,107.72x = 1,748,434.83
5. Step 5: Solve for x
   x = 1,748,434.83/1,107.72
6. Step 6: Final answer
   x = 1,578.41