Finding the Fourth Proportional to 2,624.21, 3,926.59 and 1,931.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.21 : 3,926.59 = 1,931.39 : x
2. Step 2: Convert to fraction form
   2,624.21/3,926.59 = 1,931.39/x
3. Step 3: Cross multiply
   2,624.21x = 3,926.59 × 1,931.39
4. Step 4: Simplify right side
   2,624.21x = 7,583,752.20
5. Step 5: Solve for x
   x = 7,583,752.20/2,624.21
6. Step 6: Final answer
   x = 2,889.92