Finding the Fourth Proportional to 213,819.52, 320,748.72 and 56,047.36

Step by Step Solution

1. Step 1: Write the proportion equation
   213,819.52 : 320,748.72 = 56,047.36 : x
2. Step 2: Convert to fraction form
   213,819.52/320,748.72 = 56,047.36/x
3. Step 3: Cross multiply
   213,819.52x = 320,748.72 × 56,047.36
4. Step 4: Simplify right side
   213,819.52x = 17,977,118,979.38
5. Step 5: Solve for x
   x = 17,977,118,979.38/213,819.52
6. Step 6: Final answer
   x = 84,076.14