Finding the Fourth Proportional to 78,005.91, 116,986.55 and 25,419.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,005.91 : 116,986.55 = 25,419.99 : x
2. Step 2: Convert to fraction form
   78,005.91/116,986.55 = 25,419.99/x
3. Step 3: Cross multiply
   78,005.91x = 116,986.55 × 25,419.99
4. Step 4: Simplify right side
   78,005.91x = 2,973,796,804.03
5. Step 5: Solve for x
   x = 2,973,796,804.03/78,005.91
6. Step 6: Final answer
   x = 38,122.71