Finding the Third Proportional to 183,406.50 and 388,890

Step by Step Solution

1. Step 1: Write the proportion equation
   183,406.50 : 388,890 = 388,890 : x
2. Step 2: Convert to fraction form
   183,406.50/388,890 = 388,890/x
3. Step 3: Cross multiply
   183,406.50x = 388,890 × 388,890
4. Step 4: Simplify right side
   183,406.50x = 151,235,432,100
5. Step 5: Solve for x
   x = 151,235,432,100/183,406.50
6. Step 6: Final answer
   x = 824,591.45