Finding the Fourth Proportional to 1,056,109.43, 1,584,231 and 407,994.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056,109.43 : 1,584,231 = 407,994.72 : x
2. Step 2: Convert to fraction form
   1,056,109.43/1,584,231 = 407,994.72/x
3. Step 3: Cross multiply
   1,056,109.43x = 1,584,231 × 407,994.72
4. Step 4: Simplify right side
   1,056,109.43x = 646,357,883,260.32
5. Step 5: Solve for x
   x = 646,357,883,260.32/1,056,109.43
6. Step 6: Final answer
   x = 612,017.91