Finding the Third Proportional to 64,880.16 and 139,460.06

Step by Step Solution

1. Step 1: Write the proportion equation
   64,880.16 : 139,460.06 = 139,460.06 : x
2. Step 2: Convert to fraction form
   64,880.16/139,460.06 = 139,460.06/x
3. Step 3: Cross multiply
   64,880.16x = 139,460.06 × 139,460.06
4. Step 4: Simplify right side
   64,880.16x = 19,449,109,032.50
5. Step 5: Solve for x
   x = 19,449,109,032.50/64,880.16
6. Step 6: Final answer
   x = 299,769.76