Finding the Third Proportional to 140,900.61 and 286,721.96

Step by Step Solution

1. Step 1: Write the proportion equation
   140,900.61 : 286,721.96 = 286,721.96 : x
2. Step 2: Convert to fraction form
   140,900.61/286,721.96 = 286,721.96/x
3. Step 3: Cross multiply
   140,900.61x = 286,721.96 × 286,721.96
4. Step 4: Simplify right side
   140,900.61x = 82,209,485,123.86
5. Step 5: Solve for x
   x = 82,209,485,123.86/140,900.61
6. Step 6: Final answer
   x = 583,457.28