Finding the Third Proportional to 369,131 and 578,300

Step by Step Solution

1. Step 1: Write the proportion equation
   369,131 : 578,300 = 578,300 : x
2. Step 2: Convert to fraction form
   369,131/578,300 = 578,300/x
3. Step 3: Cross multiply
   369,131x = 578,300 × 578,300
4. Step 4: Simplify right side
   369,131x = 334,430,890,000
5. Step 5: Solve for x
   x = 334,430,890,000/369,131
6. Step 6: Final answer
   x = 905,995.13