Finding the Third Proportional to 128,691 and 193,981.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,691 : 193,981.50 = 193,981.50 : x
2. Step 2: Convert to fraction form
   128,691/193,981.50 = 193,981.50/x
3. Step 3: Cross multiply
   128,691x = 193,981.50 × 193,981.50
4. Step 4: Simplify right side
   128,691x = 37,628,822,342.25
5. Step 5: Solve for x
   x = 37,628,822,342.25/128,691
6. Step 6: Final answer
   x = 292,396.69