Finding the Fourth Proportional to 631,404.85, 947,115.48 and 210,680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   631,404.85 : 947,115.48 = 210,680.72 : x
2. Step 2: Convert to fraction form
   631,404.85/947,115.48 = 210,680.72/x
3. Step 3: Cross multiply
   631,404.85x = 947,115.48 × 210,680.72
4. Step 4: Simplify right side
   631,404.85x = 199,538,973,617.33
5. Step 5: Solve for x
   x = 199,538,973,617.33/631,404.85
6. Step 6: Final answer
   x = 316,023.82