Finding the Fourth Proportional to 39,830.15, 54,965.59 and 21,925.06

Step by Step Solution

1. Step 1: Write the proportion equation
   39,830.15 : 54,965.59 = 21,925.06 : x
2. Step 2: Convert to fraction form
   39,830.15/54,965.59 = 21,925.06/x
3. Step 3: Cross multiply
   39,830.15x = 54,965.59 × 21,925.06
4. Step 4: Simplify right side
   39,830.15x = 1,205,123,996.10
5. Step 5: Solve for x
   x = 1,205,123,996.10/39,830.15
6. Step 6: Final answer
   x = 30,256.58