Finding the Fourth Proportional to 78,720.56, 118,080.42 and 19,556.24

Step by Step Solution

1. Step 1: Write the proportion equation
   78,720.56 : 118,080.42 = 19,556.24 : x
2. Step 2: Convert to fraction form
   78,720.56/118,080.42 = 19,556.24/x
3. Step 3: Cross multiply
   78,720.56x = 118,080.42 × 19,556.24
4. Step 4: Simplify right side
   78,720.56x = 2,309,209,032.82
5. Step 5: Solve for x
   x = 2,309,209,032.82/78,720.56
6. Step 6: Final answer
   x = 29,334.26