Finding the Fourth Proportional to 9,929.93, 13,701.81 and 5,680.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,929.93 : 13,701.81 = 5,680.31 : x
2. Step 2: Convert to fraction form
   9,929.93/13,701.81 = 5,680.31/x
3. Step 3: Cross multiply
   9,929.93x = 13,701.81 × 5,680.31
4. Step 4: Simplify right side
   9,929.93x = 77,830,583.92
5. Step 5: Solve for x
   x = 77,830,583.92/9,929.93
6. Step 6: Final answer
   x = 7,837.98