Finding the Fourth Proportional to 665,449,145.31, 913,511,015.69 and 571,199,667.06

Step by Step Solution

1. Step 1: Write the proportion equation
   665,449,145.31 : 913,511,015.69 = 571,199,667.06 : x
2. Step 2: Convert to fraction form
   665,449,145.31/913,511,015.69 = 571,199,667.06/x
3. Step 3: Cross multiply
   665,449,145.31x = 913,511,015.69 × 571,199,667.06
4. Step 4: Simplify right side
   665,449,145.31x = 521,797,188,019,541,120
5. Step 5: Solve for x
   x = 521,797,188,019,541,120/665,449,145.31
6. Step 6: Final answer
   x = 784,127,820.58