Finding the Fourth Proportional to 301,613.31, 452,496.55 and 139,624.15

Step by Step Solution

1. Step 1: Write the proportion equation
   301,613.31 : 452,496.55 = 139,624.15 : x
2. Step 2: Convert to fraction form
   301,613.31/452,496.55 = 139,624.15/x
3. Step 3: Cross multiply
   301,613.31x = 452,496.55 × 139,624.15
4. Step 4: Simplify right side
   301,613.31x = 63,179,444,528.96
5. Step 5: Solve for x
   x = 63,179,444,528.96/301,613.31
6. Step 6: Final answer
   x = 209,471.67