Finding the Fourth Proportional to 1,434,139.60, 1,979,037.50 and 789,433.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434,139.60 : 1,979,037.50 = 789,433.88 : x
2. Step 2: Convert to fraction form
   1,434,139.60/1,979,037.50 = 789,433.88/x
3. Step 3: Cross multiply
   1,434,139.60x = 1,979,037.50 × 789,433.88
4. Step 4: Simplify right side
   1,434,139.60x = 1,562,319,252,290.50
5. Step 5: Solve for x
   x = 1,562,319,252,290.50/1,434,139.60
6. Step 6: Final answer
   x = 1,089,377.39