Finding the Third Proportional to 136,578 and 278,572.88

Step by Step Solution

1. Step 1: Write the proportion equation
   136,578 : 278,572.88 = 278,572.88 : x
2. Step 2: Convert to fraction form
   136,578/278,572.88 = 278,572.88/x
3. Step 3: Cross multiply
   136,578x = 278,572.88 × 278,572.88
4. Step 4: Simplify right side
   136,578x = 77,602,846,685.77
5. Step 5: Solve for x
   x = 77,602,846,685.77/136,578
6. Step 6: Final answer
   x = 568,194.34