Finding the Third Proportional to 143,088 and 212,940

Step by Step Solution

1. Step 1: Write the proportion equation
   143,088 : 212,940 = 212,940 : x
2. Step 2: Convert to fraction form
   143,088/212,940 = 212,940/x
3. Step 3: Cross multiply
   143,088x = 212,940 × 212,940
4. Step 4: Simplify right side
   143,088x = 45,343,443,600
5. Step 5: Solve for x
   x = 45,343,443,600/143,088
6. Step 6: Final answer
   x = 316,892.01