Finding the Fourth Proportional to 1,221,042.15, 1,685,141.69 and 677,353.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,221,042.15 : 1,685,141.69 = 677,353.10 : x
2. Step 2: Convert to fraction form
   1,221,042.15/1,685,141.69 = 677,353.10/x
3. Step 3: Cross multiply
   1,221,042.15x = 1,685,141.69 × 677,353.10
4. Step 4: Simplify right side
   1,221,042.15x = 1,141,435,935,848.27
5. Step 5: Solve for x
   x = 1,141,435,935,848.27/1,221,042.15
6. Step 6: Final answer
   x = 934,804.70