Finding the Fourth Proportional to 721,093,108.76, 995,161,939.98 and 403,585,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   721,093,108.76 : 995,161,939.98 = 403,585,109.72 : x
2. Step 2: Convert to fraction form
   721,093,108.76/995,161,939.98 = 403,585,109.72/x
3. Step 3: Cross multiply
   721,093,108.76x = 995,161,939.98 × 403,585,109.72
4. Step 4: Simplify right side
   721,093,108.76x = 401,632,540,735,996,416
5. Step 5: Solve for x
   x = 401,632,540,735,996,416/721,093,108.76
6. Step 6: Final answer
   x = 556,977,366.52