Finding the Fourth Proportional to 456,077.76, 684,105.12 and 123,645.12

Step by Step Solution

1. Step 1: Write the proportion equation
   456,077.76 : 684,105.12 = 123,645.12 : x
2. Step 2: Convert to fraction form
   456,077.76/684,105.12 = 123,645.12/x
3. Step 3: Cross multiply
   456,077.76x = 684,105.12 × 123,645.12
4. Step 4: Simplify right side
   456,077.76x = 84,586,259,655.01
5. Step 5: Solve for x
   x = 84,586,259,655.01/456,077.76
6. Step 6: Final answer
   x = 185,464.56