Finding the Fourth Proportional to 279,820.69, 386,155.28 and 152,499.02

Step by Step Solution

1. Step 1: Write the proportion equation
   279,820.69 : 386,155.28 = 152,499.02 : x
2. Step 2: Convert to fraction form
   279,820.69/386,155.28 = 152,499.02/x
3. Step 3: Cross multiply
   279,820.69x = 386,155.28 × 152,499.02
4. Step 4: Simplify right side
   279,820.69x = 58,888,300,218.30
5. Step 5: Solve for x
   x = 58,888,300,218.30/279,820.69
6. Step 6: Final answer
   x = 210,450.13