Finding the Third Proportional to 355,813 and 557,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,813 : 557,047.50 = 557,047.50 : x
2. Step 2: Convert to fraction form
   355,813/557,047.50 = 557,047.50/x
3. Step 3: Cross multiply
   355,813x = 557,047.50 × 557,047.50
4. Step 4: Simplify right side
   355,813x = 310,301,917,256.25
5. Step 5: Solve for x
   x = 310,301,917,256.25/355,813
6. Step 6: Final answer
   x = 872,092.69