Finding the Fourth Proportional to 42,123.84, 63,156.48 and 21,333.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,123.84 : 63,156.48 = 21,333.12 : x
2. Step 2: Convert to fraction form
   42,123.84/63,156.48 = 21,333.12/x
3. Step 3: Cross multiply
   42,123.84x = 63,156.48 × 21,333.12
4. Step 4: Simplify right side
   42,123.84x = 1,347,324,766.62
5. Step 5: Solve for x
   x = 1,347,324,766.62/42,123.84
6. Step 6: Final answer
   x = 31,984.85