Finding the Fourth Proportional to 42,711.77, 64,073.77 and 13,132.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,711.77 : 64,073.77 = 13,132.09 : x
2. Step 2: Convert to fraction form
   42,711.77/64,073.77 = 13,132.09/x
3. Step 3: Cross multiply
   42,711.77x = 64,073.77 × 13,132.09
4. Step 4: Simplify right side
   42,711.77x = 841,422,128.25
5. Step 5: Solve for x
   x = 841,422,128.25/42,711.77
6. Step 6: Final answer
   x = 19,700.01