Finding the Third Proportional to 201,258 and 430,696.50

Step by Step Solution

1. Step 1: Write the proportion equation
   201,258 : 430,696.50 = 430,696.50 : x
2. Step 2: Convert to fraction form
   201,258/430,696.50 = 430,696.50/x
3. Step 3: Cross multiply
   201,258x = 430,696.50 × 430,696.50
4. Step 4: Simplify right side
   201,258x = 185,499,475,112.25
5. Step 5: Solve for x
   x = 185,499,475,112.25/201,258
6. Step 6: Final answer
   x = 921,699.88