Finding the Fourth Proportional to 704,978.47, 1,057,867.64 and 380,762.55

Step by Step Solution

1. Step 1: Write the proportion equation
   704,978.47 : 1,057,867.64 = 380,762.55 : x
2. Step 2: Convert to fraction form
   704,978.47/1,057,867.64 = 380,762.55/x
3. Step 3: Cross multiply
   704,978.47x = 1,057,867.64 × 380,762.55
4. Step 4: Simplify right side
   704,978.47x = 402,796,379,692.93
5. Step 5: Solve for x
   x = 402,796,379,692.93/704,978.47
6. Step 6: Final answer
   x = 571,359.83