Finding the Fourth Proportional to 2,158,375.68, 2,978,564.87 and 1,178,316.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,375.68 : 2,978,564.87 = 1,178,316.25 : x
2. Step 2: Convert to fraction form
   2,158,375.68/2,978,564.87 = 1,178,316.25/x
3. Step 3: Cross multiply
   2,158,375.68x = 2,978,564.87 × 1,178,316.25
4. Step 4: Simplify right side
   2,158,375.68x = 3,509,691,383,499.52
5. Step 5: Solve for x
   x = 3,509,691,383,499.52/2,158,375.68
6. Step 6: Final answer
   x = 1,626,079.93