Finding the Fourth Proportional to 2,308,615.12, 3,185,878.74 and 1,290,019.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308,615.12 : 3,185,878.74 = 1,290,019.72 : x
2. Step 2: Convert to fraction form
   2,308,615.12/3,185,878.74 = 1,290,019.72/x
3. Step 3: Cross multiply
   2,308,615.12x = 3,185,878.74 × 1,290,019.72
4. Step 4: Simplify right side
   2,308,615.12x = 4,109,846,400,128.75
5. Step 5: Solve for x
   x = 4,109,846,400,128.75/2,308,615.12
6. Step 6: Final answer
   x = 1,780,221.56