Finding the Fourth Proportional to 920,978.88, 1,378,917.72 and 470,730.24

Step by Step Solution

1. Step 1: Write the proportion equation
   920,978.88 : 1,378,917.72 = 470,730.24 : x
2. Step 2: Convert to fraction form
   920,978.88/1,378,917.72 = 470,730.24/x
3. Step 3: Cross multiply
   920,978.88x = 1,378,917.72 × 470,730.24
4. Step 4: Simplify right side
   920,978.88x = 649,098,269,275.85
5. Step 5: Solve for x
   x = 649,098,269,275.85/920,978.88
6. Step 6: Final answer
   x = 704,791.70