Finding the Fourth Proportional to 280,111.23, 386,553.42 and 152,786.79

Step by Step Solution

1. Step 1: Write the proportion equation
   280,111.23 : 386,553.42 = 152,786.79 : x
2. Step 2: Convert to fraction form
   280,111.23/386,553.42 = 152,786.79/x
3. Step 3: Cross multiply
   280,111.23x = 386,553.42 × 152,786.79
4. Step 4: Simplify right side
   280,111.23x = 59,060,256,205.32
5. Step 5: Solve for x
   x = 59,060,256,205.32/280,111.23
6. Step 6: Final answer
   x = 210,845.73