Finding the Fourth Proportional to 19,012.71, 28,499.29 and 7,158.34

Step by Step Solution

1. Step 1: Write the proportion equation
   19,012.71 : 28,499.29 = 7,158.34 : x
2. Step 2: Convert to fraction form
   19,012.71/28,499.29 = 7,158.34/x
3. Step 3: Cross multiply
   19,012.71x = 28,499.29 × 7,158.34
4. Step 4: Simplify right side
   19,012.71x = 204,007,607.58
5. Step 5: Solve for x
   x = 204,007,607.58/19,012.71
6. Step 6: Final answer
   x = 10,730.06