Finding the Third Proportional to 128,925 and 199,219.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,925 : 199,219.50 = 199,219.50 : x
2. Step 2: Convert to fraction form
   128,925/199,219.50 = 199,219.50/x
3. Step 3: Cross multiply
   128,925x = 199,219.50 × 199,219.50
4. Step 4: Simplify right side
   128,925x = 39,688,409,180.25
5. Step 5: Solve for x
   x = 39,688,409,180.25/128,925
6. Step 6: Final answer
   x = 307,841.06