Finding the Fourth Proportional to 42,231.78, 63,380.34 and 21,192.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,231.78 : 63,380.34 = 21,192.84 : x
2. Step 2: Convert to fraction form
   42,231.78/63,380.34 = 21,192.84/x
3. Step 3: Cross multiply
   42,231.78x = 63,380.34 × 21,192.84
4. Step 4: Simplify right side
   42,231.78x = 1,343,209,404.77
5. Step 5: Solve for x
   x = 1,343,209,404.77/42,231.78
6. Step 6: Final answer
   x = 31,805.65