Finding the Fourth Proportional to 2,590.83, 3,886.84 and 947.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.83 : 3,886.84 = 947.38 : x
2. Step 2: Convert to fraction form
   2,590.83/3,886.84 = 947.38/x
3. Step 3: Cross multiply
   2,590.83x = 3,886.84 × 947.38
4. Step 4: Simplify right side
   2,590.83x = 3,682,310.43
5. Step 5: Solve for x
   x = 3,682,310.43/2,590.83
6. Step 6: Final answer
   x = 1,421.28