Finding the Fourth Proportional to 42,768.62, 64,156.52 and 15,758.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,768.62 : 64,156.52 = 15,758.31 : x
2. Step 2: Convert to fraction form
   42,768.62/64,156.52 = 15,758.31/x
3. Step 3: Cross multiply
   42,768.62x = 64,156.52 × 15,758.31
4. Step 4: Simplify right side
   42,768.62x = 1,010,998,330.68
5. Step 5: Solve for x
   x = 1,010,998,330.68/42,768.62
6. Step 6: Final answer
   x = 23,638.79