Finding the Fourth Proportional to 82,816.72, 123,991.80 and 74,418.64

Step by Step Solution

1. Step 1: Write the proportion equation
   82,816.72 : 123,991.80 = 74,418.64 : x
2. Step 2: Convert to fraction form
   82,816.72/123,991.80 = 74,418.64/x
3. Step 3: Cross multiply
   82,816.72x = 123,991.80 × 74,418.64
4. Step 4: Simplify right side
   82,816.72x = 9,227,301,127.15
5. Step 5: Solve for x
   x = 9,227,301,127.15/82,816.72
6. Step 6: Final answer
   x = 111,418.34