Finding the Fourth Proportional to 102,856.84, 141,940.56 and 58,144.84

Step by Step Solution

1. Step 1: Write the proportion equation
   102,856.84 : 141,940.56 = 58,144.84 : x
2. Step 2: Convert to fraction form
   102,856.84/141,940.56 = 58,144.84/x
3. Step 3: Cross multiply
   102,856.84x = 141,940.56 × 58,144.84
4. Step 4: Simplify right side
   102,856.84x = 8,253,111,150.71
5. Step 5: Solve for x
   x = 8,253,111,150.71/102,856.84
6. Step 6: Final answer
   x = 80,238.82