Finding the Third Proportional to 389,725 and 584,641.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,725 : 584,641.50 = 584,641.50 : x
2. Step 2: Convert to fraction form
   389,725/584,641.50 = 584,641.50/x
3. Step 3: Cross multiply
   389,725x = 584,641.50 × 584,641.50
4. Step 4: Simplify right side
   389,725x = 341,805,683,522.25
5. Step 5: Solve for x
   x = 341,805,683,522.25/389,725
6. Step 6: Final answer
   x = 877,043.26