Finding the Fourth Proportional to 360,456,519.96, 540,705,715.00 and 139,129,123.77

Step by Step Solution

1. Step 1: Write the proportion equation
   360,456,519.96 : 540,705,715.00 = 139,129,123.77 : x
2. Step 2: Convert to fraction form
   360,456,519.96/540,705,715.00 = 139,129,123.77/x
3. Step 3: Cross multiply
   360,456,519.96x = 540,705,715.00 × 139,129,123.77
4. Step 4: Simplify right side
   360,456,519.96x = 75,227,912,345,033,520
5. Step 5: Solve for x
   x = 75,227,912,345,033,520/360,456,519.96
6. Step 6: Final answer
   x = 208,701,766.18