Finding the Fourth Proportional to 707,780, 976,716.72 and 385,483.04

Step by Step Solution

1. Step 1: Write the proportion equation
   707,780 : 976,716.72 = 385,483.04 : x
2. Step 2: Convert to fraction form
   707,780/976,716.72 = 385,483.04/x
3. Step 3: Cross multiply
   707,780x = 976,716.72 × 385,483.04
4. Step 4: Simplify right side
   707,780x = 376,507,730,444.43
5. Step 5: Solve for x
   x = 376,507,730,444.43/707,780
6. Step 6: Final answer
   x = 531,955.88