Finding the Fourth Proportional to 42,908.34, 64,303.28 and 30,966.92

Step by Step Solution

1. Step 1: Write the proportion equation
   42,908.34 : 64,303.28 = 30,966.92 : x
2. Step 2: Convert to fraction form
   42,908.34/64,303.28 = 30,966.92/x
3. Step 3: Cross multiply
   42,908.34x = 64,303.28 × 30,966.92
4. Step 4: Simplify right side
   42,908.34x = 1,991,274,527.50
5. Step 5: Solve for x
   x = 1,991,274,527.50/42,908.34
6. Step 6: Final answer
   x = 46,407.63