Finding the Fourth Proportional to 145,869.78, 201,300.42 and 78,801.78

Step by Step Solution

1. Step 1: Write the proportion equation
   145,869.78 : 201,300.42 = 78,801.78 : x
2. Step 2: Convert to fraction form
   145,869.78/201,300.42 = 78,801.78/x
3. Step 3: Cross multiply
   145,869.78x = 201,300.42 × 78,801.78
4. Step 4: Simplify right side
   145,869.78x = 15,862,831,410.75
5. Step 5: Solve for x
   x = 15,862,831,410.75/145,869.78
6. Step 6: Final answer
   x = 108,746.52