Finding the Third Proportional to 133,870 and 278,835.50

Step by Step Solution

1. Step 1: Write the proportion equation
   133,870 : 278,835.50 = 278,835.50 : x
2. Step 2: Convert to fraction form
   133,870/278,835.50 = 278,835.50/x
3. Step 3: Cross multiply
   133,870x = 278,835.50 × 278,835.50
4. Step 4: Simplify right side
   133,870x = 77,749,236,060.25
5. Step 5: Solve for x
   x = 77,749,236,060.25/133,870
6. Step 6: Final answer
   x = 580,781.62