Finding the Fourth Proportional to 280,983.89, 387,760.83 and 153,656.75

Step by Step Solution

1. Step 1: Write the proportion equation
   280,983.89 : 387,760.83 = 153,656.75 : x
2. Step 2: Convert to fraction form
   280,983.89/387,760.83 = 153,656.75/x
3. Step 3: Cross multiply
   280,983.89x = 387,760.83 × 153,656.75
4. Step 4: Simplify right side
   280,983.89x = 59,582,068,915.10
5. Step 5: Solve for x
   x = 59,582,068,915.10/280,983.89
6. Step 6: Final answer
   x = 212,047.99