Finding the Third Proportional to 404,139 and 588,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   404,139 : 588,439.50 = 588,439.50 : x
2. Step 2: Convert to fraction form
   404,139/588,439.50 = 588,439.50/x
3. Step 3: Cross multiply
   404,139x = 588,439.50 × 588,439.50
4. Step 4: Simplify right side
   404,139x = 346,261,045,160.25
5. Step 5: Solve for x
   x = 346,261,045,160.25/404,139
6. Step 6: Final answer
   x = 856,787.01