Finding the Fourth Proportional to 78,216.96, 117,321.60 and 25,619.52

Step by Step Solution

1. Step 1: Write the proportion equation
   78,216.96 : 117,321.60 = 25,619.52 : x
2. Step 2: Convert to fraction form
   78,216.96/117,321.60 = 25,619.52/x
3. Step 3: Cross multiply
   78,216.96x = 117,321.60 × 25,619.52
4. Step 4: Simplify right side
   78,216.96x = 3,005,723,077.63
5. Step 5: Solve for x
   x = 3,005,723,077.63/78,216.96
6. Step 6: Final answer
   x = 38,428.02