Finding the Fourth Proportional to 1,610,263.90, 2,415,340.42 and 412,196.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610,263.90 : 2,415,340.42 = 412,196.55 : x
2. Step 2: Convert to fraction form
   1,610,263.90/2,415,340.42 = 412,196.55/x
3. Step 3: Cross multiply
   1,610,263.90x = 2,415,340.42 × 412,196.55
4. Step 4: Simplify right side
   1,610,263.90x = 995,594,978,111.53
5. Step 5: Solve for x
   x = 995,594,978,111.53/1,610,263.90
6. Step 6: Final answer
   x = 618,280.63