Finding the Fourth Proportional to 42,711.27, 64,073.01 and 13,131.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42,711.27 : 64,073.01 = 13,131.59 : x
2. Step 2: Convert to fraction form
   42,711.27/64,073.01 = 13,131.59/x
3. Step 3: Cross multiply
   42,711.27x = 64,073.01 × 13,131.59
4. Step 4: Simplify right side
   42,711.27x = 841,380,226.26
5. Step 5: Solve for x
   x = 841,380,226.26/42,711.27
6. Step 6: Final answer
   x = 19,699.26