Finding the Fourth Proportional to 1,509,513.20, 2,083,141.74 and 821,200.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,509,513.20 : 2,083,141.74 = 821,200.05 : x
2. Step 2: Convert to fraction form
   1,509,513.20/2,083,141.74 = 821,200.05/x
3. Step 3: Cross multiply
   1,509,513.20x = 2,083,141.74 × 821,200.05
4. Step 4: Simplify right side
   1,509,513.20x = 1,710,676,111,936.37
5. Step 5: Solve for x
   x = 1,710,676,111,936.37/1,509,513.20
6. Step 6: Final answer
   x = 1,133,263.43