Finding the Fourth Proportional to 13,012.05, 19,518.13 and 3,151.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,012.05 : 19,518.13 = 3,151.32 : x
2. Step 2: Convert to fraction form
   13,012.05/19,518.13 = 3,151.32/x
3. Step 3: Cross multiply
   13,012.05x = 19,518.13 × 3,151.32
4. Step 4: Simplify right side
   13,012.05x = 61,507,873.43
5. Step 5: Solve for x
   x = 61,507,873.43/13,012.05
6. Step 6: Final answer
   x = 4,726.99