Finding the Fourth Proportional to 213,978.28, 295,300.16 and 129,093.52

Step by Step Solution

1. Step 1: Write the proportion equation
   213,978.28 : 295,300.16 = 129,093.52 : x
2. Step 2: Convert to fraction form
   213,978.28/295,300.16 = 129,093.52/x
3. Step 3: Cross multiply
   213,978.28x = 295,300.16 × 129,093.52
4. Step 4: Simplify right side
   213,978.28x = 38,121,337,110.96
5. Step 5: Solve for x
   x = 38,121,337,110.96/213,978.28
6. Step 6: Final answer
   x = 178,155.17