Finding the Fourth Proportional to 42,953.52, 64,437 and 13,365.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,953.52 : 64,437 = 13,365.12 : x
2. Step 2: Convert to fraction form
   42,953.52/64,437 = 13,365.12/x
3. Step 3: Cross multiply
   42,953.52x = 64,437 × 13,365.12
4. Step 4: Simplify right side
   42,953.52x = 861,208,237.44
5. Step 5: Solve for x
   x = 861,208,237.44/42,953.52
6. Step 6: Final answer
   x = 20,049.77