Finding the Fourth Proportional to 279,820.56, 386,142.56 and 152,493.60

Step by Step Solution

1. Step 1: Write the proportion equation
   279,820.56 : 386,142.56 = 152,493.60 : x
2. Step 2: Convert to fraction form
   279,820.56/386,142.56 = 152,493.60/x
3. Step 3: Cross multiply
   279,820.56x = 386,142.56 × 152,493.60
4. Step 4: Simplify right side
   279,820.56x = 58,884,269,087.62
5. Step 5: Solve for x
   x = 58,884,269,087.62/279,820.56
6. Step 6: Final answer
   x = 210,435.82