Finding the Fourth Proportional to 358,910.72, 538,459.54 and 134,288.72

Step by Step Solution

1. Step 1: Write the proportion equation
   358,910.72 : 538,459.54 = 134,288.72 : x
2. Step 2: Convert to fraction form
   358,910.72/538,459.54 = 134,288.72/x
3. Step 3: Cross multiply
   358,910.72x = 538,459.54 × 134,288.72
4. Step 4: Simplify right side
   358,910.72x = 72,309,043,408.82
5. Step 5: Solve for x
   x = 72,309,043,408.82/358,910.72
6. Step 6: Final answer
   x = 201,468.05