Finding the Third Proportional to 59,821,123 and 129,851,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,821,123 : 129,851,777.50 = 129,851,777.50 : x
2. Step 2: Convert to fraction form
   59,821,123/129,851,777.50 = 129,851,777.50/x
3. Step 3: Cross multiply
   59,821,123x = 129,851,777.50 × 129,851,777.50
4. Step 4: Simplify right side
   59,821,123x = 16,861,484,119,909,506
5. Step 5: Solve for x
   x = 16,861,484,119,909,506/59,821,123
6. Step 6: Final answer
   x = 281,865,054.92