Finding the Third Proportional to 149,308 and 316,111

Step by Step Solution

1. Step 1: Write the proportion equation
   149,308 : 316,111 = 316,111 : x
2. Step 2: Convert to fraction form
   149,308/316,111 = 316,111/x
3. Step 3: Cross multiply
   149,308x = 316,111 × 316,111
4. Step 4: Simplify right side
   149,308x = 99,926,164,321
5. Step 5: Solve for x
   x = 99,926,164,321/149,308
6. Step 6: Final answer
   x = 669,261.96