Finding the Fourth Proportional to 92,982.45, 128,348.69 and 55,256.25

Step by Step Solution

1. Step 1: Write the proportion equation
   92,982.45 : 128,348.69 = 55,256.25 : x
2. Step 2: Convert to fraction form
   92,982.45/128,348.69 = 55,256.25/x
3. Step 3: Cross multiply
   92,982.45x = 128,348.69 × 55,256.25
4. Step 4: Simplify right side
   92,982.45x = 7,092,067,025.53
5. Step 5: Solve for x
   x = 7,092,067,025.53/92,982.45
6. Step 6: Final answer
   x = 76,273.18