Finding the Fourth Proportional to 2,156,928.89, 2,976,825.47 and 1,239,156.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156,928.89 : 2,976,825.47 = 1,239,156.32 : x
2. Step 2: Convert to fraction form
   2,156,928.89/2,976,825.47 = 1,239,156.32/x
3. Step 3: Cross multiply
   2,156,928.89x = 2,976,825.47 × 1,239,156.32
4. Step 4: Simplify right side
   2,156,928.89x = 3,688,752,073,607.56
5. Step 5: Solve for x
   x = 3,688,752,073,607.56/2,156,928.89
6. Step 6: Final answer
   x = 1,710,187.16