Finding the Fourth Proportional to 7,881.30, 10,842.66 and 7,662.60

Step by Step Solution

1. Step 1: Write the proportion equation
   7,881.30 : 10,842.66 = 7,662.60 : x
2. Step 2: Convert to fraction form
   7,881.30/10,842.66 = 7,662.60/x
3. Step 3: Cross multiply
   7,881.30x = 10,842.66 × 7,662.60
4. Step 4: Simplify right side
   7,881.30x = 83,082,966.52
5. Step 5: Solve for x
   x = 83,082,966.52/7,881.30
6. Step 6: Final answer
   x = 10,541.78