Finding the Fourth Proportional to 4,987.82, 7,477.41 and 2,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,987.82 : 7,477.41 = 2,931.50 : x
2. Step 2: Convert to fraction form
   4,987.82/7,477.41 = 2,931.50/x
3. Step 3: Cross multiply
   4,987.82x = 7,477.41 × 2,931.50
4. Step 4: Simplify right side
   4,987.82x = 21,920,027.42
5. Step 5: Solve for x
   x = 21,920,027.42/4,987.82
6. Step 6: Final answer
   x = 4,394.71