Finding the Fourth Proportional to 1,050.51, 1,574.46 and 920.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.51 : 1,574.46 = 920.76 : x
2. Step 2: Convert to fraction form
   1,050.51/1,574.46 = 920.76/x
3. Step 3: Cross multiply
   1,050.51x = 1,574.46 × 920.76
4. Step 4: Simplify right side
   1,050.51x = 1,449,693.89
5. Step 5: Solve for x
   x = 1,449,693.89/1,050.51
6. Step 6: Final answer
   x = 1,380.00