Finding the Third Proportional to 91,072,280 and 139,898,161

Step by Step Solution

1. Step 1: Write the proportion equation
   91,072,280 : 139,898,161 = 139,898,161 : x
2. Step 2: Convert to fraction form
   91,072,280/139,898,161 = 139,898,161/x
3. Step 3: Cross multiply
   91,072,280x = 139,898,161 × 139,898,161
4. Step 4: Simplify right side
   91,072,280x = 19,571,495,451,181,920
5. Step 5: Solve for x
   x = 19,571,495,451,181,920/91,072,280
6. Step 6: Final answer
   x = 214,900,686.04