Finding the Fourth Proportional to 42,754.88, 64,140.72 and 13,167.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,754.88 : 64,140.72 = 13,167.68 : x
2. Step 2: Convert to fraction form
   42,754.88/64,140.72 = 13,167.68/x
3. Step 3: Cross multiply
   42,754.88x = 64,140.72 × 13,167.68
4. Step 4: Simplify right side
   42,754.88x = 844,584,475.93
5. Step 5: Solve for x
   x = 844,584,475.93/42,754.88
6. Step 6: Final answer
   x = 19,754.11