Finding the Fourth Proportional to 105,056.46, 144,978.93 and 57,309.93

Step by Step Solution

1. Step 1: Write the proportion equation
   105,056.46 : 144,978.93 = 57,309.93 : x
2. Step 2: Convert to fraction form
   105,056.46/144,978.93 = 57,309.93/x
3. Step 3: Cross multiply
   105,056.46x = 144,978.93 × 57,309.93
4. Step 4: Simplify right side
   105,056.46x = 8,308,732,329.77
5. Step 5: Solve for x
   x = 8,308,732,329.77/105,056.46
6. Step 6: Final answer
   x = 79,088.26