Finding the Fourth Proportional to 42,744.96, 64,117.92 and 28,047.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,744.96 : 64,117.92 = 28,047.12 : x
2. Step 2: Convert to fraction form
   42,744.96/64,117.92 = 28,047.12/x
3. Step 3: Cross multiply
   42,744.96x = 64,117.92 × 28,047.12
4. Step 4: Simplify right side
   42,744.96x = 1,798,322,996.39
5. Step 5: Solve for x
   x = 1,798,322,996.39/42,744.96
6. Step 6: Final answer
   x = 42,070.99