Finding the Fourth Proportional to 879,105, 1,213,164.90 and 476,697

Step by Step Solution

1. Step 1: Write the proportion equation
   879,105 : 1,213,164.90 = 476,697 : x
2. Step 2: Convert to fraction form
   879,105/1,213,164.90 = 476,697/x
3. Step 3: Cross multiply
   879,105x = 1,213,164.90 × 476,697
4. Step 4: Simplify right side
   879,105x = 578,312,068,335.30
5. Step 5: Solve for x
   x = 578,312,068,335.30/879,105
6. Step 6: Final answer
   x = 657,841.86