Finding the Fourth Proportional to 109,662.60, 164,119.62 and 91,913.31

Step by Step Solution

1. Step 1: Write the proportion equation
   109,662.60 : 164,119.62 = 91,913.31 : x
2. Step 2: Convert to fraction form
   109,662.60/164,119.62 = 91,913.31/x
3. Step 3: Cross multiply
   109,662.60x = 164,119.62 × 91,913.31
4. Step 4: Simplify right side
   109,662.60x = 15,084,776,876.22
5. Step 5: Solve for x
   x = 15,084,776,876.22/109,662.60
6. Step 6: Final answer
   x = 137,556.26