Finding the Third Proportional to 19,781,739.75 and 42,176,377.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,781,739.75 : 42,176,377.50 = 42,176,377.50 : x
2. Step 2: Convert to fraction form
   19,781,739.75/42,176,377.50 = 42,176,377.50/x
3. Step 3: Cross multiply
   19,781,739.75x = 42,176,377.50 × 42,176,377.50
4. Step 4: Simplify right side
   19,781,739.75x = 1,778,846,819,022,506.25
5. Step 5: Solve for x
   x = 1,778,846,819,022,506.25/19,781,739.75
6. Step 6: Final answer
   x = 89,923,679.19