Finding the Fourth Proportional to 19,158.72, 28,737.28 and 5,307.36

Step by Step Solution

1. Step 1: Write the proportion equation
   19,158.72 : 28,737.28 = 5,307.36 : x
2. Step 2: Convert to fraction form
   19,158.72/28,737.28 = 5,307.36/x
3. Step 3: Cross multiply
   19,158.72x = 28,737.28 × 5,307.36
4. Step 4: Simplify right side
   19,158.72x = 152,519,090.38
5. Step 5: Solve for x
   x = 152,519,090.38/19,158.72
6. Step 6: Final answer
   x = 7,960.82