Finding the Fourth Proportional to 72,448.89, 108,674.10 and 19,858.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,448.89 : 108,674.10 = 19,858.38 : x
2. Step 2: Convert to fraction form
   72,448.89/108,674.10 = 19,858.38/x
3. Step 3: Cross multiply
   72,448.89x = 108,674.10 × 19,858.38
4. Step 4: Simplify right side
   72,448.89x = 2,158,091,573.96
5. Step 5: Solve for x
   x = 2,158,091,573.96/72,448.89
6. Step 6: Final answer
   x = 29,787.78