Finding the Fourth Proportional to 1,018,685.63, 1,405,479.56 and 610,638.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,685.63 : 1,405,479.56 = 610,638.59 : x
2. Step 2: Convert to fraction form
   1,018,685.63/1,405,479.56 = 610,638.59/x
3. Step 3: Cross multiply
   1,018,685.63x = 1,405,479.56 × 610,638.59
4. Step 4: Simplify right side
   1,018,685.63x = 858,240,056,792.22
5. Step 5: Solve for x
   x = 858,240,056,792.22/1,018,685.63
6. Step 6: Final answer
   x = 842,497.46