Finding the Fourth Proportional to 2,520.05, 3,780.47 and 1,058.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.05 : 3,780.47 = 1,058.81 : x
2. Step 2: Convert to fraction form
   2,520.05/3,780.47 = 1,058.81/x
3. Step 3: Cross multiply
   2,520.05x = 3,780.47 × 1,058.81
4. Step 4: Simplify right side
   2,520.05x = 4,002,783.19
5. Step 5: Solve for x
   x = 4,002,783.19/2,520.05
6. Step 6: Final answer
   x = 1,588.38