Finding the Fourth Proportional to 9,979.02, 13,768.83 and 5,729.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.02 : 13,768.83 = 5,729.82 : x
2. Step 2: Convert to fraction form
   9,979.02/13,768.83 = 5,729.82/x
3. Step 3: Cross multiply
   9,979.02x = 13,768.83 × 5,729.82
4. Step 4: Simplify right side
   9,979.02x = 78,892,917.51
5. Step 5: Solve for x
   x = 78,892,917.51/9,979.02
6. Step 6: Final answer
   x = 7,905.88