Finding the Fourth Proportional to 2,158,726.86, 2,977,967.61 and 1,286,947.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,726.86 : 2,977,967.61 = 1,286,947.28 : x
2. Step 2: Convert to fraction form
   2,158,726.86/2,977,967.61 = 1,286,947.28/x
3. Step 3: Cross multiply
   2,158,726.86x = 2,977,967.61 × 1,286,947.28
4. Step 4: Simplify right side
   2,158,726.86x = 3,832,487,315,617.60
5. Step 5: Solve for x
   x = 3,832,487,315,617.60/2,158,726.86
6. Step 6: Final answer
   x = 1,775,346.10