Finding the Third Proportional to 31,501,669.50 and 68,381,172

Step by Step Solution

1. Step 1: Write the proportion equation
   31,501,669.50 : 68,381,172 = 68,381,172 : x
2. Step 2: Convert to fraction form
   31,501,669.50/68,381,172 = 68,381,172/x
3. Step 3: Cross multiply
   31,501,669.50x = 68,381,172 × 68,381,172
4. Step 4: Simplify right side
   31,501,669.50x = 4,675,984,684,093,584
5. Step 5: Solve for x
   x = 4,675,984,684,093,584/31,501,669.50
6. Step 6: Final answer
   x = 148,436,091.11