Finding the Third Proportional to 135,990 and 294,574.50

Step by Step Solution

1. Step 1: Write the proportion equation
   135,990 : 294,574.50 = 294,574.50 : x
2. Step 2: Convert to fraction form
   135,990/294,574.50 = 294,574.50/x
3. Step 3: Cross multiply
   135,990x = 294,574.50 × 294,574.50
4. Step 4: Simplify right side
   135,990x = 86,774,136,050.25
5. Step 5: Solve for x
   x = 86,774,136,050.25/135,990
6. Step 6: Final answer
   x = 638,092.04