Finding the Fourth Proportional to 64,903.68, 89,581.50 and 42,203.16

Step by Step Solution

1. Step 1: Write the proportion equation
   64,903.68 : 89,581.50 = 42,203.16 : x
2. Step 2: Convert to fraction form
   64,903.68/89,581.50 = 42,203.16/x
3. Step 3: Cross multiply
   64,903.68x = 89,581.50 × 42,203.16
4. Step 4: Simplify right side
   64,903.68x = 3,780,622,377.54
5. Step 5: Solve for x
   x = 3,780,622,377.54/64,903.68
6. Step 6: Final answer
   x = 58,249.74