Finding the Fourth Proportional to 1,012,128.59, 1,396,738.82 and 582,400.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012,128.59 : 1,396,738.82 = 582,400.10 : x
2. Step 2: Convert to fraction form
   1,012,128.59/1,396,738.82 = 582,400.10/x
3. Step 3: Cross multiply
   1,012,128.59x = 1,396,738.82 × 582,400.10
4. Step 4: Simplify right side
   1,012,128.59x = 813,460,828,441.88
5. Step 5: Solve for x
   x = 813,460,828,441.88/1,012,128.59
6. Step 6: Final answer
   x = 803,712.92