Finding the Fourth Proportional to 1,009,945.40, 1,392,463.98 and 646,772.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009,945.40 : 1,392,463.98 = 646,772.18 : x
2. Step 2: Convert to fraction form
   1,009,945.40/1,392,463.98 = 646,772.18/x
3. Step 3: Cross multiply
   1,009,945.40x = 1,392,463.98 × 646,772.18
4. Step 4: Simplify right side
   1,009,945.40x = 900,606,956,953.76
5. Step 5: Solve for x
   x = 900,606,956,953.76/1,009,945.40
6. Step 6: Final answer
   x = 891,738.27