Finding the Fourth Proportional to 631,404.18, 947,114.47 and 210,680.05

Step by Step Solution

1. Step 1: Write the proportion equation
   631,404.18 : 947,114.47 = 210,680.05 : x
2. Step 2: Convert to fraction form
   631,404.18/947,114.47 = 210,680.05/x
3. Step 3: Cross multiply
   631,404.18x = 947,114.47 × 210,680.05
4. Step 4: Simplify right side
   631,404.18x = 199,538,124,898.61
5. Step 5: Solve for x
   x = 199,538,124,898.61/631,404.18
6. Step 6: Final answer
   x = 316,022.81