Finding the Fourth Proportional to 39,219.83, 54,123.72 and 21,314.88

Step by Step Solution

1. Step 1: Write the proportion equation
   39,219.83 : 54,123.72 = 21,314.88 : x
2. Step 2: Convert to fraction form
   39,219.83/54,123.72 = 21,314.88/x
3. Step 3: Cross multiply
   39,219.83x = 54,123.72 × 21,314.88
4. Step 4: Simplify right side
   39,219.83x = 1,153,640,530.25
5. Step 5: Solve for x
   x = 1,153,640,530.25/39,219.83
6. Step 6: Final answer
   x = 29,414.73