Finding the Fourth Proportional to 456,819,906.72, 630,412,271.04 and 247,976,191.20

Step by Step Solution

1. Step 1: Write the proportion equation
   456,819,906.72 : 630,412,271.04 = 247,976,191.20 : x
2. Step 2: Convert to fraction form
   456,819,906.72/630,412,271.04 = 247,976,191.20/x
3. Step 3: Cross multiply
   456,819,906.72x = 630,412,271.04 × 247,976,191.20
4. Step 4: Simplify right side
   456,819,906.72x = 156,327,233,858,241,248
5. Step 5: Solve for x
   x = 156,327,233,858,241,248/456,819,906.72
6. Step 6: Final answer
   x = 342,207,577.99