Finding the Fourth Proportional to 1,051.47, 1,577.45 and 743.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.47 : 1,577.45 = 743.91 : x
2. Step 2: Convert to fraction form
   1,051.47/1,577.45 = 743.91/x
3. Step 3: Cross multiply
   1,051.47x = 1,577.45 × 743.91
4. Step 4: Simplify right side
   1,051.47x = 1,173,480.83
5. Step 5: Solve for x
   x = 1,173,480.83/1,051.47
6. Step 6: Final answer
   x = 1,116.04