Finding the Fourth Proportional to 42,837.70, 64,223.60 and 21,760.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,837.70 : 64,223.60 = 21,760.42 : x
2. Step 2: Convert to fraction form
   42,837.70/64,223.60 = 21,760.42/x
3. Step 3: Cross multiply
   42,837.70x = 64,223.60 × 21,760.42
4. Step 4: Simplify right side
   42,837.70x = 1,397,532,509.91
5. Step 5: Solve for x
   x = 1,397,532,509.91/42,837.70
6. Step 6: Final answer
   x = 32,623.89