Finding the Fourth Proportional to 39,773.82, 54,887.88 and 21,870.03

Step by Step Solution

1. Step 1: Write the proportion equation
   39,773.82 : 54,887.88 = 21,870.03 : x
2. Step 2: Convert to fraction form
   39,773.82/54,887.88 = 21,870.03/x
3. Step 3: Cross multiply
   39,773.82x = 54,887.88 × 21,870.03
4. Step 4: Simplify right side
   39,773.82x = 1,200,399,747.06
5. Step 5: Solve for x
   x = 1,200,399,747.06/39,773.82
6. Step 6: Final answer
   x = 30,180.65