Finding the Third Proportional to 265,111 and 401,528

Step by Step Solution

1. Step 1: Write the proportion equation
   265,111 : 401,528 = 401,528 : x
2. Step 2: Convert to fraction form
   265,111/401,528 = 401,528/x
3. Step 3: Cross multiply
   265,111x = 401,528 × 401,528
4. Step 4: Simplify right side
   265,111x = 161,224,734,784
5. Step 5: Solve for x
   x = 161,224,734,784/265,111
6. Step 6: Final answer
   x = 608,140.50