Finding the Fourth Proportional to 10,667.16, 15,977.63 and 7,739

Step by Step Solution

1. Step 1: Write the proportion equation
   10,667.16 : 15,977.63 = 7,739 : x
2. Step 2: Convert to fraction form
   10,667.16/15,977.63 = 7,739/x
3. Step 3: Cross multiply
   10,667.16x = 15,977.63 × 7,739
4. Step 4: Simplify right side
   10,667.16x = 123,650,878.57
5. Step 5: Solve for x
   x = 123,650,878.57/10,667.16
6. Step 6: Final answer
   x = 11,591.73