Finding the Fourth Proportional to 2,158,134.57, 2,978,225.26 and 1,191,264.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,134.57 : 2,978,225.26 = 1,191,264.61 : x
2. Step 2: Convert to fraction form
   2,158,134.57/2,978,225.26 = 1,191,264.61/x
3. Step 3: Cross multiply
   2,158,134.57x = 2,978,225.26 × 1,191,264.61
4. Step 4: Simplify right side
   2,158,134.57x = 3,547,854,342,422.32
5. Step 5: Solve for x
   x = 3,547,854,342,422.32/2,158,134.57
6. Step 6: Final answer
   x = 1,643,944.91