Finding the Fourth Proportional to 42,740.82, 64,117.41 and 13,150.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,740.82 : 64,117.41 = 13,150.74 : x
2. Step 2: Convert to fraction form
   42,740.82/64,117.41 = 13,150.74/x
3. Step 3: Cross multiply
   42,740.82x = 64,117.41 × 13,150.74
4. Step 4: Simplify right side
   42,740.82x = 843,191,388.38
5. Step 5: Solve for x
   x = 843,191,388.38/42,740.82
6. Step 6: Final answer
   x = 19,728.01