Finding the Fourth Proportional to 100,910, 139,260.12 and 56,198

Step by Step Solution

1. Step 1: Write the proportion equation
   100,910 : 139,260.12 = 56,198 : x
2. Step 2: Convert to fraction form
   100,910/139,260.12 = 56,198/x
3. Step 3: Cross multiply
   100,910x = 139,260.12 × 56,198
4. Step 4: Simplify right side
   100,910x = 7,826,140,223.76
5. Step 5: Solve for x
   x = 7,826,140,223.76/100,910
6. Step 6: Final answer
   x = 77,555.65