Finding the Fourth Proportional to 91,380.54, 137,083.68 and 28,205.82

Step by Step Solution

1. Step 1: Write the proportion equation
   91,380.54 : 137,083.68 = 28,205.82 : x
2. Step 2: Convert to fraction form
   91,380.54/137,083.68 = 28,205.82/x
3. Step 3: Cross multiply
   91,380.54x = 137,083.68 × 28,205.82
4. Step 4: Simplify right side
   91,380.54x = 3,866,557,603.02
5. Step 5: Solve for x
   x = 3,866,557,603.02/91,380.54
6. Step 6: Final answer
   x = 42,312.70