Finding the Fourth Proportional to 100,736.62, 139,016.86 and 55,418.05

Step by Step Solution

1. Step 1: Write the proportion equation
   100,736.62 : 139,016.86 = 55,418.05 : x
2. Step 2: Convert to fraction form
   100,736.62/139,016.86 = 55,418.05/x
3. Step 3: Cross multiply
   100,736.62x = 139,016.86 × 55,418.05
4. Step 4: Simplify right side
   100,736.62x = 7,704,043,298.32
5. Step 5: Solve for x
   x = 7,704,043,298.32/100,736.62
6. Step 6: Final answer
   x = 76,477.09