Finding the Fourth Proportional to 689,363.25, 951,321.30 and 403,123.83

Step by Step Solution

1. Step 1: Write the proportion equation
   689,363.25 : 951,321.30 = 403,123.83 : x
2. Step 2: Convert to fraction form
   689,363.25/951,321.30 = 403,123.83/x
3. Step 3: Cross multiply
   689,363.25x = 951,321.30 × 403,123.83
4. Step 4: Simplify right side
   689,363.25x = 383,500,286,016.58
5. Step 5: Solve for x
   x = 383,500,286,016.58/689,363.25
6. Step 6: Final answer
   x = 556,310.89