Finding the Third Proportional to 379,213 and 810,913.50

Step by Step Solution

1. Step 1: Write the proportion equation
   379,213 : 810,913.50 = 810,913.50 : x
2. Step 2: Convert to fraction form
   379,213/810,913.50 = 810,913.50/x
3. Step 3: Cross multiply
   379,213x = 810,913.50 × 810,913.50
4. Step 4: Simplify right side
   379,213x = 657,580,704,482.25
5. Step 5: Solve for x
   x = 657,580,704,482.25/379,213
6. Step 6: Final answer
   x = 1,734,066.88