Finding the Fourth Proportional to 123,873, 170,915.42 and 72,887.96

Step by Step Solution

1. Step 1: Write the proportion equation
   123,873 : 170,915.42 = 72,887.96 : x
2. Step 2: Convert to fraction form
   123,873/170,915.42 = 72,887.96/x
3. Step 3: Cross multiply
   123,873x = 170,915.42 × 72,887.96
4. Step 4: Simplify right side
   123,873x = 12,457,676,296.34
5. Step 5: Solve for x
   x = 12,457,676,296.34/123,873
6. Step 6: Final answer
   x = 100,568.13