Finding the Fourth Proportional to 353,099.82, 529,436.49 and 142,491.72

Step by Step Solution

1. Step 1: Write the proportion equation
   353,099.82 : 529,436.49 = 142,491.72 : x
2. Step 2: Convert to fraction form
   353,099.82/529,436.49 = 142,491.72/x
3. Step 3: Cross multiply
   353,099.82x = 529,436.49 × 142,491.72
4. Step 4: Simplify right side
   353,099.82x = 75,440,316,090.86
5. Step 5: Solve for x
   x = 75,440,316,090.86/353,099.82
6. Step 6: Final answer
   x = 213,651.53