Finding the Third Proportional to 137,554.50 and 290,039.81

Step by Step Solution

1. Step 1: Write the proportion equation
   137,554.50 : 290,039.81 = 290,039.81 : x
2. Step 2: Convert to fraction form
   137,554.50/290,039.81 = 290,039.81/x
3. Step 3: Cross multiply
   137,554.50x = 290,039.81 × 290,039.81
4. Step 4: Simplify right side
   137,554.50x = 84,123,092,835.04
5. Step 5: Solve for x
   x = 84,123,092,835.04/137,554.50
6. Step 6: Final answer
   x = 611,561.91