Finding the Fourth Proportional to 38,736, 53,462.24 and 21,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   38,736 : 53,462.24 = 21,978.72 : x
2. Step 2: Convert to fraction form
   38,736/53,462.24 = 21,978.72/x
3. Step 3: Cross multiply
   38,736x = 53,462.24 × 21,978.72
4. Step 4: Simplify right side
   38,736x = 1,175,031,603.53
5. Step 5: Solve for x
   x = 1,175,031,603.53/38,736
6. Step 6: Final answer
   x = 30,334.36