Finding the Third Proportional to 19,781,312 and 41,688,064

Step by Step Solution

1. Step 1: Write the proportion equation
   19,781,312 : 41,688,064 = 41,688,064 : x
2. Step 2: Convert to fraction form
   19,781,312/41,688,064 = 41,688,064/x
3. Step 3: Cross multiply
   19,781,312x = 41,688,064 × 41,688,064
4. Step 4: Simplify right side
   19,781,312x = 1,737,894,680,068,096
5. Step 5: Solve for x
   x = 1,737,894,680,068,096/19,781,312
6. Step 6: Final answer
   x = 87,855,379.87