Finding the Fourth Proportional to 13,011.71, 19,517.61 and 3,150.99

Step by Step Solution

1. Step 1: Write the proportion equation
   13,011.71 : 19,517.61 = 3,150.99 : x
2. Step 2: Convert to fraction form
   13,011.71/19,517.61 = 3,150.99/x
3. Step 3: Cross multiply
   13,011.71x = 19,517.61 × 3,150.99
4. Step 4: Simplify right side
   13,011.71x = 61,499,863.19
5. Step 5: Solve for x
   x = 61,499,863.19/13,011.71
6. Step 6: Final answer
   x = 4,726.50