Finding the Fourth Proportional to 280,069.12, 386,490.72 and 152,737.12

Step by Step Solution

1. Step 1: Write the proportion equation
   280,069.12 : 386,490.72 = 152,737.12 : x
2. Step 2: Convert to fraction form
   280,069.12/386,490.72 = 152,737.12/x
3. Step 3: Cross multiply
   280,069.12x = 386,490.72 × 152,737.12
4. Step 4: Simplify right side
   280,069.12x = 59,031,479,479.53
5. Step 5: Solve for x
   x = 59,031,479,479.53/280,069.12
6. Step 6: Final answer
   x = 210,774.68