Finding the Fourth Proportional to 522,483,016.63, 721,026,680.69 and 287,533,677.10

Step by Step Solution

1. Step 1: Write the proportion equation
   522,483,016.63 : 721,026,680.69 = 287,533,677.10 : x
2. Step 2: Convert to fraction form
   522,483,016.63/721,026,680.69 = 287,533,677.10/x
3. Step 3: Cross multiply
   522,483,016.63x = 721,026,680.69 × 287,533,677.10
4. Step 4: Simplify right side
   522,483,016.63x = 207,319,452,786,003,296
5. Step 5: Solve for x
   x = 207,319,452,786,003,296/522,483,016.63
6. Step 6: Final answer
   x = 396,796,539.19