Finding the Fourth Proportional to 279,811.56, 386,128.71 and 152,484.42

Step by Step Solution

1. Step 1: Write the proportion equation
   279,811.56 : 386,128.71 = 152,484.42 : x
2. Step 2: Convert to fraction form
   279,811.56/386,128.71 = 152,484.42/x
3. Step 3: Cross multiply
   279,811.56x = 386,128.71 × 152,484.42
4. Step 4: Simplify right side
   279,811.56x = 58,878,612,389.70
5. Step 5: Solve for x
   x = 58,878,612,389.70/279,811.56
6. Step 6: Final answer
   x = 210,422.37