Finding the Fourth Proportional to 2,156,364.16, 2,976,738.96 and 1,392,790

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156,364.16 : 2,976,738.96 = 1,392,790 : x
2. Step 2: Convert to fraction form
   2,156,364.16/2,976,738.96 = 1,392,790/x
3. Step 3: Cross multiply
   2,156,364.16x = 2,976,738.96 × 1,392,790
4. Step 4: Simplify right side
   2,156,364.16x = 4,145,972,256,098.40
5. Step 5: Solve for x
   x = 4,145,972,256,098.40/2,156,364.16
6. Step 6: Final answer
   x = 1,922,667.95