Finding the Third Proportional to 138,551.63 and 298,735.88

Step by Step Solution

1. Step 1: Write the proportion equation
   138,551.63 : 298,735.88 = 298,735.88 : x
2. Step 2: Convert to fraction form
   138,551.63/298,735.88 = 298,735.88/x
3. Step 3: Cross multiply
   138,551.63x = 298,735.88 × 298,735.88
4. Step 4: Simplify right side
   138,551.63x = 89,243,123,012.02
5. Step 5: Solve for x
   x = 89,243,123,012.02/138,551.63
6. Step 6: Final answer
   x = 644,114.59