Finding the Fourth Proportional to 2,590.99, 3,886.38 and 947.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.99 : 3,886.38 = 947.50 : x
2. Step 2: Convert to fraction form
   2,590.99/3,886.38 = 947.50/x
3. Step 3: Cross multiply
   2,590.99x = 3,886.38 × 947.50
4. Step 4: Simplify right side
   2,590.99x = 3,682,335.33
5. Step 5: Solve for x
   x = 3,682,335.33/2,590.99
6. Step 6: Final answer
   x = 1,421.21