Finding the Third Proportional to 231,376 and 349,978

Step by Step Solution

1. Step 1: Write the proportion equation
   231,376 : 349,978 = 349,978 : x
2. Step 2: Convert to fraction form
   231,376/349,978 = 349,978/x
3. Step 3: Cross multiply
   231,376x = 349,978 × 349,978
4. Step 4: Simplify right side
   231,376x = 122,484,600,484
5. Step 5: Solve for x
   x = 122,484,600,484/231,376
6. Step 6: Final answer
   x = 529,374.70