Finding the Fourth Proportional to 2,923.86, 4,385.31 and 1,074.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,923.86 : 4,385.31 = 1,074.51 : x
2. Step 2: Convert to fraction form
   2,923.86/4,385.31 = 1,074.51/x
3. Step 3: Cross multiply
   2,923.86x = 4,385.31 × 1,074.51
4. Step 4: Simplify right side
   2,923.86x = 4,712,059.45
5. Step 5: Solve for x
   x = 4,712,059.45/2,923.86
6. Step 6: Final answer
   x = 1,611.59