Finding the Fourth Proportional to 142,128.54, 213,067.32 and 57,959.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,128.54 : 213,067.32 = 57,959.10 : x
2. Step 2: Convert to fraction form
   142,128.54/213,067.32 = 57,959.10/x
3. Step 3: Cross multiply
   142,128.54x = 213,067.32 × 57,959.10
4. Step 4: Simplify right side
   142,128.54x = 12,349,190,106.61
5. Step 5: Solve for x
   x = 12,349,190,106.61/142,128.54
6. Step 6: Final answer
   x = 86,887.48