Finding the Third Proportional to 175,815 and 272,409.75

Step by Step Solution

1. Step 1: Write the proportion equation
   175,815 : 272,409.75 = 272,409.75 : x
2. Step 2: Convert to fraction form
   175,815/272,409.75 = 272,409.75/x
3. Step 3: Cross multiply
   175,815x = 272,409.75 × 272,409.75
4. Step 4: Simplify right side
   175,815x = 74,207,071,895.06
5. Step 5: Solve for x
   x = 74,207,071,895.06/175,815
6. Step 6: Final answer
   x = 422,074.75