Finding the Third Proportional to 216,156 and 345,314.25

Step by Step Solution

1. Step 1: Write the proportion equation
   216,156 : 345,314.25 = 345,314.25 : x
2. Step 2: Convert to fraction form
   216,156/345,314.25 = 345,314.25/x
3. Step 3: Cross multiply
   216,156x = 345,314.25 × 345,314.25
4. Step 4: Simplify right side
   216,156x = 119,241,931,253.06
5. Step 5: Solve for x
   x = 119,241,931,253.06/216,156
6. Step 6: Final answer
   x = 551,647.57