Finding the Fourth Proportional to 123,833.16, 170,887.32 and 72,851.40

Step by Step Solution

1. Step 1: Write the proportion equation
   123,833.16 : 170,887.32 = 72,851.40 : x
2. Step 2: Convert to fraction form
   123,833.16/170,887.32 = 72,851.40/x
3. Step 3: Cross multiply
   123,833.16x = 170,887.32 × 72,851.40
4. Step 4: Simplify right side
   123,833.16x = 12,449,380,504.25
5. Step 5: Solve for x
   x = 12,449,380,504.25/123,833.16
6. Step 6: Final answer
   x = 100,533.50