Finding the Fourth Proportional to 78,584.39, 117,876.68 and 19,419.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,584.39 : 117,876.68 = 19,419.15 : x
2. Step 2: Convert to fraction form
   78,584.39/117,876.68 = 19,419.15/x
3. Step 3: Cross multiply
   78,584.39x = 117,876.68 × 19,419.15
4. Step 4: Simplify right side
   78,584.39x = 2,289,064,833.33
5. Step 5: Solve for x
   x = 2,289,064,833.33/78,584.39
6. Step 6: Final answer
   x = 29,128.75