Finding the Third Proportional to 258,061 and 379,501

Step by Step Solution

1. Step 1: Write the proportion equation
   258,061 : 379,501 = 379,501 : x
2. Step 2: Convert to fraction form
   258,061/379,501 = 379,501/x
3. Step 3: Cross multiply
   258,061x = 379,501 × 379,501
4. Step 4: Simplify right side
   258,061x = 144,021,009,001
5. Step 5: Solve for x
   x = 144,021,009,001/258,061
6. Step 6: Final answer
   x = 558,089.01