Finding the Fourth Proportional to 102,510.12, 141,465.78 and 57,189

Step by Step Solution

1. Step 1: Write the proportion equation
   102,510.12 : 141,465.78 = 57,189 : x
2. Step 2: Convert to fraction form
   102,510.12/141,465.78 = 57,189/x
3. Step 3: Cross multiply
   102,510.12x = 141,465.78 × 57,189
4. Step 4: Simplify right side
   102,510.12x = 8,090,286,492.42
5. Step 5: Solve for x
   x = 8,090,286,492.42/102,510.12
6. Step 6: Final answer
   x = 78,921.83