Finding the Fourth Proportional to 998,123.12, 1,377,443.88 and 545,443.28

Step by Step Solution

1. Step 1: Write the proportion equation
   998,123.12 : 1,377,443.88 = 545,443.28 : x
2. Step 2: Convert to fraction form
   998,123.12/1,377,443.88 = 545,443.28/x
3. Step 3: Cross multiply
   998,123.12x = 1,377,443.88 × 545,443.28
4. Step 4: Simplify right side
   998,123.12x = 751,317,507,923.13
5. Step 5: Solve for x
   x = 751,317,507,923.13/998,123.12
6. Step 6: Final answer
   x = 752,730.29