Finding the Fourth Proportional to 10,533.82, 15,805.33 and 4,991.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,533.82 : 15,805.33 = 4,991.12 : x
2. Step 2: Convert to fraction form
   10,533.82/15,805.33 = 4,991.12/x
3. Step 3: Cross multiply
   10,533.82x = 15,805.33 × 4,991.12
4. Step 4: Simplify right side
   10,533.82x = 78,886,298.67
5. Step 5: Solve for x
   x = 78,886,298.67/10,533.82
6. Step 6: Final answer
   x = 7,488.86