Finding the Third Proportional to 137,308.88 and 289,380

Step by Step Solution

1. Step 1: Write the proportion equation
   137,308.88 : 289,380 = 289,380 : x
2. Step 2: Convert to fraction form
   137,308.88/289,380 = 289,380/x
3. Step 3: Cross multiply
   137,308.88x = 289,380 × 289,380
4. Step 4: Simplify right side
   137,308.88x = 83,740,784,400
5. Step 5: Solve for x
   x = 83,740,784,400/137,308.88
6. Step 6: Final answer
   x = 609,871.61