Finding the Third Proportional to 193,470 and 421,477.50

Step by Step Solution

1. Step 1: Write the proportion equation
   193,470 : 421,477.50 = 421,477.50 : x
2. Step 2: Convert to fraction form
   193,470/421,477.50 = 421,477.50/x
3. Step 3: Cross multiply
   193,470x = 421,477.50 × 421,477.50
4. Step 4: Simplify right side
   193,470x = 177,643,283,006.25
5. Step 5: Solve for x
   x = 177,643,283,006.25/193,470
6. Step 6: Final answer
   x = 918,195.50