Finding the Fourth Proportional to 30,555.32, 42,116.82 and 21,588.44

Step by Step Solution

1. Step 1: Write the proportion equation
   30,555.32 : 42,116.82 = 21,588.44 : x
2. Step 2: Convert to fraction form
   30,555.32/42,116.82 = 21,588.44/x
3. Step 3: Cross multiply
   30,555.32x = 42,116.82 × 21,588.44
4. Step 4: Simplify right side
   30,555.32x = 909,236,441.56
5. Step 5: Solve for x
   x = 909,236,441.56/30,555.32
6. Step 6: Final answer
   x = 29,757.06