Finding the Fourth Proportional to 298,980,456.10, 447,620,378.55 and 298,980,456.10

Step by Step Solution

1. Step 1: Write the proportion equation
   298,980,456.10 : 447,620,378.55 = 298,980,456.10 : x
2. Step 2: Convert to fraction form
   298,980,456.10/447,620,378.55 = 298,980,456.10/x
3. Step 3: Cross multiply
   298,980,456.10x = 447,620,378.55 × 298,980,456.10
4. Step 4: Simplify right side
   298,980,456.10x = 133,829,744,938,533,664
5. Step 5: Solve for x
   x = 133,829,744,938,533,664/298,980,456.10
6. Step 6: Final answer
   x = 447,620,378.55