Finding the Fourth Proportional to 138,404.25, 190,997.86 and 74,742.05

Step by Step Solution

1. Step 1: Write the proportion equation
   138,404.25 : 190,997.86 = 74,742.05 : x
2. Step 2: Convert to fraction form
   138,404.25/190,997.86 = 74,742.05/x
3. Step 3: Cross multiply
   138,404.25x = 190,997.86 × 74,742.05
4. Step 4: Simplify right side
   138,404.25x = 14,275,571,602.01
5. Step 5: Solve for x
   x = 14,275,571,602.01/138,404.25
6. Step 6: Final answer
   x = 103,144.03