Finding the Fourth Proportional to 109,662.10, 164,493.15 and 83,418.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,662.10 : 164,493.15 = 83,418.10 : x
2. Step 2: Convert to fraction form
   109,662.10/164,493.15 = 83,418.10/x
3. Step 3: Cross multiply
   109,662.10x = 164,493.15 × 83,418.10
4. Step 4: Simplify right side
   109,662.10x = 13,721,706,036.02
5. Step 5: Solve for x
   x = 13,721,706,036.02/109,662.10
6. Step 6: Final answer
   x = 125,127.15