Finding the Fourth Proportional to 1,095,009.30, 1,641,736.35 and 420,830.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095,009.30 : 1,641,736.35 = 420,830.10 : x
2. Step 2: Convert to fraction form
   1,095,009.30/1,641,736.35 = 420,830.10/x
3. Step 3: Cross multiply
   1,095,009.30x = 1,641,736.35 × 420,830.10
4. Step 4: Simplify right side
   1,095,009.30x = 690,892,072,344.14
5. Step 5: Solve for x
   x = 690,892,072,344.14/1,095,009.30
6. Step 6: Final answer
   x = 630,946.31