Finding the Fourth Proportional to 128,905.25, 193,367.18 and 53,949.98

Step by Step Solution

1. Step 1: Write the proportion equation
   128,905.25 : 193,367.18 = 53,949.98 : x
2. Step 2: Convert to fraction form
   128,905.25/193,367.18 = 53,949.98/x
3. Step 3: Cross multiply
   128,905.25x = 193,367.18 × 53,949.98
4. Step 4: Simplify right side
   128,905.25x = 10,432,156,111.95
5. Step 5: Solve for x
   x = 10,432,156,111.95/128,905.25
6. Step 6: Final answer
   x = 80,928.87