Finding the Fourth Proportional to 2,308,643.72, 3,185,867.20 and 1,290,056.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308,643.72 : 3,185,867.20 = 1,290,056.84 : x
2. Step 2: Convert to fraction form
   2,308,643.72/3,185,867.20 = 1,290,056.84/x
3. Step 3: Cross multiply
   2,308,643.72x = 3,185,867.20 × 1,290,056.84
4. Step 4: Simplify right side
   2,308,643.72x = 4,109,949,772,691.65
5. Step 5: Solve for x
   x = 4,109,949,772,691.65/2,308,643.72
6. Step 6: Final answer
   x = 1,780,244.28