Finding the Fourth Proportional to 138,342.94, 190,837.83 and 120,406.30

Step by Step Solution

1. Step 1: Write the proportion equation
   138,342.94 : 190,837.83 = 120,406.30 : x
2. Step 2: Convert to fraction form
   138,342.94/190,837.83 = 120,406.30/x
3. Step 3: Cross multiply
   138,342.94x = 190,837.83 × 120,406.30
4. Step 4: Simplify right side
   138,342.94x = 22,978,077,010.33
5. Step 5: Solve for x
   x = 22,978,077,010.33/138,342.94
6. Step 6: Final answer
   x = 166,095.05