Finding the Third Proportional to 300,813.75 and 521,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,813.75 : 521,158.50 = 521,158.50 : x
2. Step 2: Convert to fraction form
   300,813.75/521,158.50 = 521,158.50/x
3. Step 3: Cross multiply
   300,813.75x = 521,158.50 × 521,158.50
4. Step 4: Simplify right side
   300,813.75x = 271,606,182,122.25
5. Step 5: Solve for x
   x = 271,606,182,122.25/300,813.75
6. Step 6: Final answer
   x = 902,904.81