Finding the Fourth Proportional to 213,016.16, 319,281.27 and 133,090.88

Step by Step Solution

1. Step 1: Write the proportion equation
   213,016.16 : 319,281.27 = 133,090.88 : x
2. Step 2: Convert to fraction form
   213,016.16/319,281.27 = 133,090.88/x
3. Step 3: Cross multiply
   213,016.16x = 319,281.27 × 133,090.88
4. Step 4: Simplify right side
   213,016.16x = 42,493,425,191.82
5. Step 5: Solve for x
   x = 42,493,425,191.82/213,016.16
6. Step 6: Final answer
   x = 199,484.51