Finding the Fourth Proportional to 281,434.48, 388,380.18 and 152,374.30

Step by Step Solution

1. Step 1: Write the proportion equation
   281,434.48 : 388,380.18 = 152,374.30 : x
2. Step 2: Convert to fraction form
   281,434.48/388,380.18 = 152,374.30/x
3. Step 3: Cross multiply
   281,434.48x = 388,380.18 × 152,374.30
4. Step 4: Simplify right side
   281,434.48x = 59,179,158,061.37
5. Step 5: Solve for x
   x = 59,179,158,061.37/281,434.48
6. Step 6: Final answer
   x = 210,276.86