Finding the Fourth Proportional to 123,886.94, 170,997.75 and 72,916.03

Step by Step Solution

1. Step 1: Write the proportion equation
   123,886.94 : 170,997.75 = 72,916.03 : x
2. Step 2: Convert to fraction form
   123,886.94/170,997.75 = 72,916.03/x
3. Step 3: Cross multiply
   123,886.94x = 170,997.75 × 72,916.03
4. Step 4: Simplify right side
   123,886.94x = 12,468,477,068.93
5. Step 5: Solve for x
   x = 12,468,477,068.93/123,886.94
6. Step 6: Final answer
   x = 100,644.00