Finding the Third Proportional to 366,916 and 561,316.75

Step by Step Solution

1. Step 1: Write the proportion equation
   366,916 : 561,316.75 = 561,316.75 : x
2. Step 2: Convert to fraction form
   366,916/561,316.75 = 561,316.75/x
3. Step 3: Cross multiply
   366,916x = 561,316.75 × 561,316.75
4. Step 4: Simplify right side
   366,916x = 315,076,493,830.56
5. Step 5: Solve for x
   x = 315,076,493,830.56/366,916
6. Step 6: Final answer
   x = 858,715.60