Finding the Fourth Proportional to 279,871.71, 386,222.04 and 152,547.31

Step by Step Solution

1. Step 1: Write the proportion equation
   279,871.71 : 386,222.04 = 152,547.31 : x
2. Step 2: Convert to fraction form
   279,871.71/386,222.04 = 152,547.31/x
3. Step 3: Cross multiply
   279,871.71x = 386,222.04 × 152,547.31
4. Step 4: Simplify right side
   279,871.71x = 58,917,133,264.71
5. Step 5: Solve for x
   x = 58,917,133,264.71/279,871.71
6. Step 6: Final answer
   x = 210,514.79