Finding the Third Proportional to 666,378 and 974,573.50

Step by Step Solution

1. Step 1: Write the proportion equation
   666,378 : 974,573.50 = 974,573.50 : x
2. Step 2: Convert to fraction form
   666,378/974,573.50 = 974,573.50/x
3. Step 3: Cross multiply
   666,378x = 974,573.50 × 974,573.50
4. Step 4: Simplify right side
   666,378x = 949,793,506,902.25
5. Step 5: Solve for x
   x = 949,793,506,902.25/666,378
6. Step 6: Final answer
   x = 1,425,307.42