Finding the Fourth Proportional to 42,902.72, 64,354.24 and 15,200.64

Step by Step Solution

1. Step 1: Write the proportion equation
   42,902.72 : 64,354.24 = 15,200.64 : x
2. Step 2: Convert to fraction form
   42,902.72/64,354.24 = 15,200.64/x
3. Step 3: Cross multiply
   42,902.72x = 64,354.24 × 15,200.64
4. Step 4: Simplify right side
   42,902.72x = 978,225,634.71
5. Step 5: Solve for x
   x = 978,225,634.71/42,902.72
6. Step 6: Final answer
   x = 22,801.02