Finding the Third Proportional to 18,211,238,280 and 42,156,391,248

Step by Step Solution

1. Step 1: Write the proportion equation
   18,211,238,280 : 42,156,391,248 = 42,156,391,248 : x
2. Step 2: Convert to fraction form
   18,211,238,280/42,156,391,248 = 42,156,391,248/x
3. Step 3: Cross multiply
   18,211,238,280x = 42,156,391,248 × 42,156,391,248
4. Step 4: Simplify right side
   18,211,238,280x = 1,777,161,323,054,450,868,224
5. Step 5: Solve for x
   x = 1,777,161,323,054,450,868,224/18,211,238,280
6. Step 6: Final answer
   x = 97,585,968,385.59