Finding the Fourth Proportional to 30,787.84, 42,467.52 and 21,352.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,787.84 : 42,467.52 = 21,352.96 : x
2. Step 2: Convert to fraction form
   30,787.84/42,467.52 = 21,352.96/x
3. Step 3: Cross multiply
   30,787.84x = 42,467.52 × 21,352.96
4. Step 4: Simplify right side
   30,787.84x = 906,807,255.86
5. Step 5: Solve for x
   x = 906,807,255.86/30,787.84
6. Step 6: Final answer
   x = 29,453.42