Finding the Fourth Proportional to 78,340.18, 117,498.10 and 25,749.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,340.18 : 117,498.10 = 25,749.30 : x
2. Step 2: Convert to fraction form
   78,340.18/117,498.10 = 25,749.30/x
3. Step 3: Cross multiply
   78,340.18x = 117,498.10 × 25,749.30
4. Step 4: Simplify right side
   78,340.18x = 3,025,493,826.33
5. Step 5: Solve for x
   x = 3,025,493,826.33/78,340.18
6. Step 6: Final answer
   x = 38,619.95