Finding the Fourth Proportional to 1,095,081.30, 1,641,844.35 and 420,902.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095,081.30 : 1,641,844.35 = 420,902.10 : x
2. Step 2: Convert to fraction form
   1,095,081.30/1,641,844.35 = 420,902.10/x
3. Step 3: Cross multiply
   1,095,081.30x = 1,641,844.35 × 420,902.10
4. Step 4: Simplify right side
   1,095,081.30x = 691,055,734,788.14
5. Step 5: Solve for x
   x = 691,055,734,788.14/1,095,081.30
6. Step 6: Final answer
   x = 631,054.27