Finding the Fourth Proportional to 78,166, 107,958.18 and 52,971.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,166 : 107,958.18 = 52,971.76 : x
2. Step 2: Convert to fraction form
   78,166/107,958.18 = 52,971.76/x
3. Step 3: Cross multiply
   78,166x = 107,958.18 × 52,971.76
4. Step 4: Simplify right side
   78,166x = 5,718,734,801.00
5. Step 5: Solve for x
   x = 5,718,734,801.00/78,166
6. Step 6: Final answer
   x = 73,161.41