Finding the Fourth Proportional to 906,510.42, 1,250,986.89 and 498,654.06

Step by Step Solution

1. Step 1: Write the proportion equation
   906,510.42 : 1,250,986.89 = 498,654.06 : x
2. Step 2: Convert to fraction form
   906,510.42/1,250,986.89 = 498,654.06/x
3. Step 3: Cross multiply
   906,510.42x = 1,250,986.89 × 498,654.06
4. Step 4: Simplify right side
   906,510.42x = 623,809,691,705.27
5. Step 5: Solve for x
   x = 623,809,691,705.27/906,510.42
6. Step 6: Final answer
   x = 688,143.98