Finding the Fourth Proportional to 405,903,957.98, 560,147,462.06 and 220,264,973.67

Step by Step Solution

1. Step 1: Write the proportion equation
   405,903,957.98 : 560,147,462.06 = 220,264,973.67 : x
2. Step 2: Convert to fraction form
   405,903,957.98/560,147,462.06 = 220,264,973.67/x
3. Step 3: Cross multiply
   405,903,957.98x = 560,147,462.06 × 220,264,973.67
4. Step 4: Simplify right side
   405,903,957.98x = 123,380,865,981,963,200
5. Step 5: Solve for x
   x = 123,380,865,981,963,200/405,903,957.98
6. Step 6: Final answer
   x = 303,965,663.69