Finding the Fourth Proportional to 42,940.62, 64,431.54 and 22,164.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,940.62 : 64,431.54 = 22,164.12 : x
2. Step 2: Convert to fraction form
   42,940.62/64,431.54 = 22,164.12/x
3. Step 3: Cross multiply
   42,940.62x = 64,431.54 × 22,164.12
4. Step 4: Simplify right side
   42,940.62x = 1,428,068,384.34
5. Step 5: Solve for x
   x = 1,428,068,384.34/42,940.62
6. Step 6: Final answer
   x = 33,256.82