Finding the Third Proportional to 19,445,636 and 42,390,280

Step by Step Solution

1. Step 1: Write the proportion equation
   19,445,636 : 42,390,280 = 42,390,280 : x
2. Step 2: Convert to fraction form
   19,445,636/42,390,280 = 42,390,280/x
3. Step 3: Cross multiply
   19,445,636x = 42,390,280 × 42,390,280
4. Step 4: Simplify right side
   19,445,636x = 1,796,935,838,478,400
5. Step 5: Solve for x
   x = 1,796,935,838,478,400/19,445,636
6. Step 6: Final answer
   x = 92,408,180.35