Finding the Third Proportional to 393,435.56 and 607,513.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,435.56 : 607,513.50 = 607,513.50 : x
2. Step 2: Convert to fraction form
   393,435.56/607,513.50 = 607,513.50/x
3. Step 3: Cross multiply
   393,435.56x = 607,513.50 × 607,513.50
4. Step 4: Simplify right side
   393,435.56x = 369,072,652,682.25
5. Step 5: Solve for x
   x = 369,072,652,682.25/393,435.56
6. Step 6: Final answer
   x = 938,076.49