Finding the Fourth Proportional to 72,428.34, 108,693.81 and 32,990.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,428.34 : 108,693.81 = 32,990.58 : x
2. Step 2: Convert to fraction form
   72,428.34/108,693.81 = 32,990.58/x
3. Step 3: Cross multiply
   72,428.34x = 108,693.81 × 32,990.58
4. Step 4: Simplify right side
   72,428.34x = 3,585,871,834.31
5. Step 5: Solve for x
   x = 3,585,871,834.31/72,428.34
6. Step 6: Final answer
   x = 49,509.24