Finding the Fourth Proportional to 42,982.22, 64,389.46 and 28,146.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,982.22 : 64,389.46 = 28,146.16 : x
2. Step 2: Convert to fraction form
   42,982.22/64,389.46 = 28,146.16/x
3. Step 3: Cross multiply
   42,982.22x = 64,389.46 × 28,146.16
4. Step 4: Simplify right side
   42,982.22x = 1,812,315,925.27
5. Step 5: Solve for x
   x = 1,812,315,925.27/42,982.22
6. Step 6: Final answer
   x = 42,164.32