Finding the Third Proportional to 156,379,138 and 212,142,472

Step by Step Solution

1. Step 1: Write the proportion equation
   156,379,138 : 212,142,472 = 212,142,472 : x
2. Step 2: Convert to fraction form
   156,379,138/212,142,472 = 212,142,472/x
3. Step 3: Cross multiply
   156,379,138x = 212,142,472 × 212,142,472
4. Step 4: Simplify right side
   156,379,138x = 45,004,428,426,270,784
5. Step 5: Solve for x
   x = 45,004,428,426,270,784/156,379,138
6. Step 6: Final answer
   x = 287,790,487.92