Finding the Fourth Proportional to 281,971.31, 389,145.01 and 154,671.50

Step by Step Solution

1. Step 1: Write the proportion equation
   281,971.31 : 389,145.01 = 154,671.50 : x
2. Step 2: Convert to fraction form
   281,971.31/389,145.01 = 154,671.50/x
3. Step 3: Cross multiply
   281,971.31x = 389,145.01 × 154,671.50
4. Step 4: Simplify right side
   281,971.31x = 60,189,642,414.22
5. Step 5: Solve for x
   x = 60,189,642,414.22/281,971.31
6. Step 6: Final answer
   x = 213,460.17