Finding the Fourth Proportional to 102,997.72, 142,151.25 and 74,409.87

Step by Step Solution

1. Step 1: Write the proportion equation
   102,997.72 : 142,151.25 = 74,409.87 : x
2. Step 2: Convert to fraction form
   102,997.72/142,151.25 = 74,409.87/x
3. Step 3: Cross multiply
   102,997.72x = 142,151.25 × 74,409.87
4. Step 4: Simplify right side
   102,997.72x = 10,577,456,032.84
5. Step 5: Solve for x
   x = 10,577,456,032.84/102,997.72
6. Step 6: Final answer
   x = 102,696.02