Finding the Third Proportional to 38,517,972 and 78,381,148

Step by Step Solution

1. Step 1: Write the proportion equation
   38,517,972 : 78,381,148 = 78,381,148 : x
2. Step 2: Convert to fraction form
   38,517,972/78,381,148 = 78,381,148/x
3. Step 3: Cross multiply
   38,517,972x = 78,381,148 × 78,381,148
4. Step 4: Simplify right side
   38,517,972x = 6,143,604,361,797,904
5. Step 5: Solve for x
   x = 6,143,604,361,797,904/38,517,972
6. Step 6: Final answer
   x = 159,499,683.99