Finding the Fourth Proportional to 142,987.01, 197,345.73 and 79,345.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,987.01 : 197,345.73 = 79,345.31 : x
2. Step 2: Convert to fraction form
   142,987.01/197,345.73 = 79,345.31/x
3. Step 3: Cross multiply
   142,987.01x = 197,345.73 × 79,345.31
4. Step 4: Simplify right side
   142,987.01x = 15,658,458,124.03
5. Step 5: Solve for x
   x = 15,658,458,124.03/142,987.01
6. Step 6: Final answer
   x = 109,509.65