Finding the Fourth Proportional to 109,647.64, 164,339 and 53,403.48

Step by Step Solution

1. Step 1: Write the proportion equation
   109,647.64 : 164,339 = 53,403.48 : x
2. Step 2: Convert to fraction form
   109,647.64/164,339 = 53,403.48/x
3. Step 3: Cross multiply
   109,647.64x = 164,339 × 53,403.48
4. Step 4: Simplify right side
   109,647.64x = 8,776,274,499.72
5. Step 5: Solve for x
   x = 8,776,274,499.72/109,647.64
6. Step 6: Final answer
   x = 80,040.71