Finding the Fourth Proportional to 912,353.84, 1,259,016.42 and 498,900.20

Step by Step Solution

1. Step 1: Write the proportion equation
   912,353.84 : 1,259,016.42 = 498,900.20 : x
2. Step 2: Convert to fraction form
   912,353.84/1,259,016.42 = 498,900.20/x
3. Step 3: Cross multiply
   912,353.84x = 1,259,016.42 × 498,900.20
4. Step 4: Simplify right side
   912,353.84x = 628,123,543,741.28
5. Step 5: Solve for x
   x = 628,123,543,741.28/912,353.84
6. Step 6: Final answer
   x = 688,464.84