Finding the Third Proportional to 291,789 and 634,702.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,789 : 634,702.50 = 634,702.50 : x
2. Step 2: Convert to fraction form
   291,789/634,702.50 = 634,702.50/x
3. Step 3: Cross multiply
   291,789x = 634,702.50 × 634,702.50
4. Step 4: Simplify right side
   291,789x = 402,847,263,506.25
5. Step 5: Solve for x
   x = 402,847,263,506.25/291,789
6. Step 6: Final answer
   x = 1,380,611.55