Finding the Fourth Proportional to 105,061.09, 144,981.87 and 57,316.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,061.09 : 144,981.87 = 57,316.12 : x
2. Step 2: Convert to fraction form
   105,061.09/144,981.87 = 57,316.12/x
3. Step 3: Cross multiply
   105,061.09x = 144,981.87 × 57,316.12
4. Step 4: Simplify right side
   105,061.09x = 8,309,798,258.74
5. Step 5: Solve for x
   x = 8,309,798,258.74/105,061.09
6. Step 6: Final answer
   x = 79,094.92