Finding the Fourth Proportional to 1,118,429.01, 1,677,892.59 and 408,455.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118,429.01 : 1,677,892.59 = 408,455.91 : x
2. Step 2: Convert to fraction form
   1,118,429.01/1,677,892.59 = 408,455.91/x
3. Step 3: Cross multiply
   1,118,429.01x = 1,677,892.59 × 408,455.91
4. Step 4: Simplify right side
   1,118,429.01x = 685,345,144,730.71
5. Step 5: Solve for x
   x = 685,345,144,730.71/1,118,429.01
6. Step 6: Final answer
   x = 612,774.83