Finding the Third Proportional to 190,174.50 and 256,140

Step by Step Solution

1. Step 1: Write the proportion equation
   190,174.50 : 256,140 = 256,140 : x
2. Step 2: Convert to fraction form
   190,174.50/256,140 = 256,140/x
3. Step 3: Cross multiply
   190,174.50x = 256,140 × 256,140
4. Step 4: Simplify right side
   190,174.50x = 65,607,699,600
5. Step 5: Solve for x
   x = 65,607,699,600/190,174.50
6. Step 6: Final answer
   x = 344,986.84