Finding the Third Proportional to 136,539 and 290,300.63

Step by Step Solution

1. Step 1: Write the proportion equation
   136,539 : 290,300.63 = 290,300.63 : x
2. Step 2: Convert to fraction form
   136,539/290,300.63 = 290,300.63/x
3. Step 3: Cross multiply
   136,539x = 290,300.63 × 290,300.63
4. Step 4: Simplify right side
   136,539x = 84,274,452,875.39
5. Step 5: Solve for x
   x = 84,274,452,875.39/136,539
6. Step 6: Final answer
   x = 617,218.91