Finding the Fourth Proportional to 42,716.69, 64,072.49 and 13,134.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,716.69 : 64,072.49 = 13,134.32 : x
2. Step 2: Convert to fraction form
   42,716.69/64,072.49 = 13,134.32/x
3. Step 3: Cross multiply
   42,716.69x = 64,072.49 × 13,134.32
4. Step 4: Simplify right side
   42,716.69x = 841,548,200.82
5. Step 5: Solve for x
   x = 841,548,200.82/42,716.69
6. Step 6: Final answer
   x = 19,700.69