Finding the Fourth Proportional to 100,760, 139,049.61 and 56,048

Step by Step Solution

1. Step 1: Write the proportion equation
   100,760 : 139,049.61 = 56,048 : x
2. Step 2: Convert to fraction form
   100,760/139,049.61 = 56,048/x
3. Step 3: Cross multiply
   100,760x = 139,049.61 × 56,048
4. Step 4: Simplify right side
   100,760x = 7,793,452,541.28
5. Step 5: Solve for x
   x = 7,793,452,541.28/100,760
6. Step 6: Final answer
   x = 77,346.69