Finding the Third Proportional to 434,883 and 612,409.50

Step by Step Solution

1. Step 1: Write the proportion equation
   434,883 : 612,409.50 = 612,409.50 : x
2. Step 2: Convert to fraction form
   434,883/612,409.50 = 612,409.50/x
3. Step 3: Cross multiply
   434,883x = 612,409.50 × 612,409.50
4. Step 4: Simplify right side
   434,883x = 375,045,395,690.25
5. Step 5: Solve for x
   x = 375,045,395,690.25/434,883
6. Step 6: Final answer
   x = 862,405.28