Finding the Fourth Proportional to 9,890.78, 14,826.31 and 4,945.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.78 : 14,826.31 = 4,945.32 : x
2. Step 2: Convert to fraction form
   9,890.78/14,826.31 = 4,945.32/x
3. Step 3: Cross multiply
   9,890.78x = 14,826.31 × 4,945.32
4. Step 4: Simplify right side
   9,890.78x = 73,320,835.01
5. Step 5: Solve for x
   x = 73,320,835.01/9,890.78
6. Step 6: Final answer
   x = 7,413.05