Finding the Third Proportional to 117,312 and 238,776

Step by Step Solution

1. Step 1: Write the proportion equation
   117,312 : 238,776 = 238,776 : x
2. Step 2: Convert to fraction form
   117,312/238,776 = 238,776/x
3. Step 3: Cross multiply
   117,312x = 238,776 × 238,776
4. Step 4: Simplify right side
   117,312x = 57,013,978,176
5. Step 5: Solve for x
   x = 57,013,978,176/117,312
6. Step 6: Final answer
   x = 486,002.95