Finding the Third Proportional to 64,531.69 and 138,404.91

Step by Step Solution

1. Step 1: Write the proportion equation
   64,531.69 : 138,404.91 = 138,404.91 : x
2. Step 2: Convert to fraction form
   64,531.69/138,404.91 = 138,404.91/x
3. Step 3: Cross multiply
   64,531.69x = 138,404.91 × 138,404.91
4. Step 4: Simplify right side
   64,531.69x = 19,155,918,074.07
5. Step 5: Solve for x
   x = 19,155,918,074.07/64,531.69
6. Step 6: Final answer
   x = 296,845.14