Finding the Fourth Proportional to 992,993.30, 1,490,105.55 and 520,018.10

Step by Step Solution

1. Step 1: Write the proportion equation
   992,993.30 : 1,490,105.55 = 520,018.10 : x
2. Step 2: Convert to fraction form
   992,993.30/1,490,105.55 = 520,018.10/x
3. Step 3: Cross multiply
   992,993.30x = 1,490,105.55 × 520,018.10
4. Step 4: Simplify right side
   992,993.30x = 774,881,856,910.46
5. Step 5: Solve for x
   x = 774,881,856,910.46/992,993.30
6. Step 6: Final answer
   x = 780,349.53