Finding the Fourth Proportional to 105,845.31, 146,061.54 and 57,446.14

Step by Step Solution

1. Step 1: Write the proportion equation
   105,845.31 : 146,061.54 = 57,446.14 : x
2. Step 2: Convert to fraction form
   105,845.31/146,061.54 = 57,446.14/x
3. Step 3: Cross multiply
   105,845.31x = 146,061.54 × 57,446.14
4. Step 4: Simplify right side
   105,845.31x = 8,390,671,675.46
5. Step 5: Solve for x
   x = 8,390,671,675.46/105,845.31
6. Step 6: Final answer
   x = 79,272.97