Finding the Fourth Proportional to 128,904, 193,365.31 and 53,948.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,904 : 193,365.31 = 53,948.72 : x
2. Step 2: Convert to fraction form
   128,904/193,365.31 = 53,948.72/x
3. Step 3: Cross multiply
   128,904x = 193,365.31 × 53,948.72
4. Step 4: Simplify right side
   128,904x = 10,431,810,966.90
5. Step 5: Solve for x
   x = 10,431,810,966.90/128,904
6. Step 6: Final answer
   x = 80,926.98