Finding the Third Proportional to 12,439,719 and 19,471,726.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439,719 : 19,471,726.50 = 19,471,726.50 : x
2. Step 2: Convert to fraction form
   12,439,719/19,471,726.50 = 19,471,726.50/x
3. Step 3: Cross multiply
   12,439,719x = 19,471,726.50 × 19,471,726.50
4. Step 4: Simplify right side
   12,439,719x = 379,148,132,890,802.25
5. Step 5: Solve for x
   x = 379,148,132,890,802.25/12,439,719
6. Step 6: Final answer
   x = 30,478,834.20