Finding the Fourth Proportional to 138,404.52, 190,998.25 and 74,742.30

Step by Step Solution

1. Step 1: Write the proportion equation
   138,404.52 : 190,998.25 = 74,742.30 : x
2. Step 2: Convert to fraction form
   138,404.52/190,998.25 = 74,742.30/x
3. Step 3: Cross multiply
   138,404.52x = 190,998.25 × 74,742.30
4. Step 4: Simplify right side
   138,404.52x = 14,275,648,314.12
5. Step 5: Solve for x
   x = 14,275,648,314.12/138,404.52
6. Step 6: Final answer
   x = 103,144.38