Finding the Fourth Proportional to 1,131,016.32, 1,560,762.95 and 621,715.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131,016.32 : 1,560,762.95 = 621,715.05 : x
2. Step 2: Convert to fraction form
   1,131,016.32/1,560,762.95 = 621,715.05/x
3. Step 3: Cross multiply
   1,131,016.32x = 1,560,762.95 × 621,715.05
4. Step 4: Simplify right side
   1,131,016.32x = 970,349,812,388.82
5. Step 5: Solve for x
   x = 970,349,812,388.82/1,131,016.32
6. Step 6: Final answer
   x = 857,945.01