Finding the Third Proportional to 133,028 and 287,158

Step by Step Solution

1. Step 1: Write the proportion equation
   133,028 : 287,158 = 287,158 : x
2. Step 2: Convert to fraction form
   133,028/287,158 = 287,158/x
3. Step 3: Cross multiply
   133,028x = 287,158 × 287,158
4. Step 4: Simplify right side
   133,028x = 82,459,716,964
5. Step 5: Solve for x
   x = 82,459,716,964/133,028
6. Step 6: Final answer
   x = 619,867.37