Finding the Third Proportional to 278,113 and 430,833.50

Step by Step Solution

1. Step 1: Write the proportion equation
   278,113 : 430,833.50 = 430,833.50 : x
2. Step 2: Convert to fraction form
   278,113/430,833.50 = 430,833.50/x
3. Step 3: Cross multiply
   278,113x = 430,833.50 × 430,833.50
4. Step 4: Simplify right side
   278,113x = 185,617,504,722.25
5. Step 5: Solve for x
   x = 185,617,504,722.25/278,113
6. Step 6: Final answer
   x = 667,417.58