Finding the Third Proportional to 191,818 and 287,730

Step by Step Solution

1. Step 1: Write the proportion equation
   191,818 : 287,730 = 287,730 : x
2. Step 2: Convert to fraction form
   191,818/287,730 = 287,730/x
3. Step 3: Cross multiply
   191,818x = 287,730 × 287,730
4. Step 4: Simplify right side
   191,818x = 82,788,552,900
5. Step 5: Solve for x
   x = 82,788,552,900/191,818
6. Step 6: Final answer
   x = 431,599.50