Finding the Fourth Proportional to 105,918.66, 146,168.76 and 58,173

Step by Step Solution

1. Step 1: Write the proportion equation
   105,918.66 : 146,168.76 = 58,173 : x
2. Step 2: Convert to fraction form
   105,918.66/146,168.76 = 58,173/x
3. Step 3: Cross multiply
   105,918.66x = 146,168.76 × 58,173
4. Step 4: Simplify right side
   105,918.66x = 8,503,075,275.48
5. Step 5: Solve for x
   x = 8,503,075,275.48/105,918.66
6. Step 6: Final answer
   x = 80,279.29