Finding the Fourth Proportional to 280,091.58, 386,526.15 and 152,766.78

Step by Step Solution

1. Step 1: Write the proportion equation
   280,091.58 : 386,526.15 = 152,766.78 : x
2. Step 2: Convert to fraction form
   280,091.58/386,526.15 = 152,766.78/x
3. Step 3: Cross multiply
   280,091.58x = 386,526.15 × 152,766.78
4. Step 4: Simplify right side
   280,091.58x = 59,048,355,321.30
5. Step 5: Solve for x
   x = 59,048,355,321.30/280,091.58
6. Step 6: Final answer
   x = 210,818.03