Finding the Fourth Proportional to 1,129,662.72, 1,558,945.56 and 620,376

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129,662.72 : 1,558,945.56 = 620,376 : x
2. Step 2: Convert to fraction form
   1,129,662.72/1,558,945.56 = 620,376/x
3. Step 3: Cross multiply
   1,129,662.72x = 1,558,945.56 × 620,376
4. Step 4: Simplify right side
   1,129,662.72x = 967,132,410,730.56
5. Step 5: Solve for x
   x = 967,132,410,730.56/1,129,662.72
6. Step 6: Final answer
   x = 856,124.92