Finding the Fourth Proportional to 100,789.18, 139,086.93 and 55,464.82

Step by Step Solution

1. Step 1: Write the proportion equation
   100,789.18 : 139,086.93 = 55,464.82 : x
2. Step 2: Convert to fraction form
   100,789.18/139,086.93 = 55,464.82/x
3. Step 3: Cross multiply
   100,789.18x = 139,086.93 × 55,464.82
4. Step 4: Simplify right side
   100,789.18x = 7,714,431,536.80
5. Step 5: Solve for x
   x = 7,714,431,536.80/100,789.18
6. Step 6: Final answer
   x = 76,540.27