Finding the Third Proportional to 135,064.13 and 290,142

Step by Step Solution

1. Step 1: Write the proportion equation
   135,064.13 : 290,142 = 290,142 : x
2. Step 2: Convert to fraction form
   135,064.13/290,142 = 290,142/x
3. Step 3: Cross multiply
   135,064.13x = 290,142 × 290,142
4. Step 4: Simplify right side
   135,064.13x = 84,182,380,164
5. Step 5: Solve for x
   x = 84,182,380,164/135,064.13
6. Step 6: Final answer
   x = 623,277.13