Finding the Third Proportional to 286,861.50 and 630,342

Step by Step Solution

1. Step 1: Write the proportion equation
   286,861.50 : 630,342 = 630,342 : x
2. Step 2: Convert to fraction form
   286,861.50/630,342 = 630,342/x
3. Step 3: Cross multiply
   286,861.50x = 630,342 × 630,342
4. Step 4: Simplify right side
   286,861.50x = 397,331,036,964
5. Step 5: Solve for x
   x = 397,331,036,964/286,861.50
6. Step 6: Final answer
   x = 1,385,097.12