Finding the Third Proportional to 58,970.25 and 128,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,970.25 : 128,308.50 = 128,308.50 : x
2. Step 2: Convert to fraction form
   58,970.25/128,308.50 = 128,308.50/x
3. Step 3: Cross multiply
   58,970.25x = 128,308.50 × 128,308.50
4. Step 4: Simplify right side
   58,970.25x = 16,463,071,172.25
5. Step 5: Solve for x
   x = 16,463,071,172.25/58,970.25
6. Step 6: Final answer
   x = 279,175.88