Finding the Third Proportional to 258,931.50 and 553,844

Step by Step Solution

1. Step 1: Write the proportion equation
   258,931.50 : 553,844 = 553,844 : x
2. Step 2: Convert to fraction form
   258,931.50/553,844 = 553,844/x
3. Step 3: Cross multiply
   258,931.50x = 553,844 × 553,844
4. Step 4: Simplify right side
   258,931.50x = 306,743,176,336
5. Step 5: Solve for x
   x = 306,743,176,336/258,931.50
6. Step 6: Final answer
   x = 1,184,649.90