Finding the Fourth Proportional to 102,991.50, 142,111.83 and 57,671.46

Step by Step Solution

1. Step 1: Write the proportion equation
   102,991.50 : 142,111.83 = 57,671.46 : x
2. Step 2: Convert to fraction form
   102,991.50/142,111.83 = 57,671.46/x
3. Step 3: Cross multiply
   102,991.50x = 142,111.83 × 57,671.46
4. Step 4: Simplify right side
   102,991.50x = 8,195,796,719.37
5. Step 5: Solve for x
   x = 8,195,796,719.37/102,991.50
6. Step 6: Final answer
   x = 79,577.41