Finding the Fourth Proportional to 39,906.01, 55,068.59 and 21,756.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,906.01 : 55,068.59 = 21,756.34 : x
2. Step 2: Convert to fraction form
   39,906.01/55,068.59 = 21,756.34/x
3. Step 3: Cross multiply
   39,906.01x = 55,068.59 × 21,756.34
4. Step 4: Simplify right side
   39,906.01x = 1,198,090,967.36
5. Step 5: Solve for x
   x = 1,198,090,967.36/39,906.01
6. Step 6: Final answer
   x = 30,022.82