Finding the Fourth Proportional to 2,154,342.81, 2,972,857.91 and 1,187,419.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154,342.81 : 2,972,857.91 = 1,187,419.89 : x
2. Step 2: Convert to fraction form
   2,154,342.81/2,972,857.91 = 1,187,419.89/x
3. Step 3: Cross multiply
   2,154,342.81x = 2,972,857.91 × 1,187,419.89
4. Step 4: Simplify right side
   2,154,342.81x = 3,530,030,606,540.73
5. Step 5: Solve for x
   x = 3,530,030,606,540.73/2,154,342.81
6. Step 6: Final answer
   x = 1,638,564.94