Finding the Fourth Proportional to 280,470.72, 387,065.34 and 153,158.16

Step by Step Solution

1. Step 1: Write the proportion equation
   280,470.72 : 387,065.34 = 153,158.16 : x
2. Step 2: Convert to fraction form
   280,470.72/387,065.34 = 153,158.16/x
3. Step 3: Cross multiply
   280,470.72x = 387,065.34 × 153,158.16
4. Step 4: Simplify right side
   280,470.72x = 59,282,215,274.17
5. Step 5: Solve for x
   x = 59,282,215,274.17/280,470.72
6. Step 6: Final answer
   x = 211,366.86