Finding the Fourth Proportional to 1,392,098.72, 1,921,100.37 and 771,947.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392,098.72 : 1,921,100.37 = 771,947.58 : x
2. Step 2: Convert to fraction form
   1,392,098.72/1,921,100.37 = 771,947.58/x
3. Step 3: Cross multiply
   1,392,098.72x = 1,921,100.37 × 771,947.58
4. Step 4: Simplify right side
   1,392,098.72x = 1,482,988,770,023.23
5. Step 5: Solve for x
   x = 1,482,988,770,023.23/1,392,098.72
6. Step 6: Final answer
   x = 1,065,289.95