Finding the Fourth Proportional to 28,783.80, 43,172.69 and 7,726.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,783.80 : 43,172.69 = 7,726.10 : x
2. Step 2: Convert to fraction form
   28,783.80/43,172.69 = 7,726.10/x
3. Step 3: Cross multiply
   28,783.80x = 43,172.69 × 7,726.10
4. Step 4: Simplify right side
   28,783.80x = 333,556,265.72
5. Step 5: Solve for x
   x = 333,556,265.72/28,783.80
6. Step 6: Final answer
   x = 11,588.33