Finding the Fourth Proportional to 78,379.81, 108,101.59 and 51,549.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,379.81 : 108,101.59 = 51,549.87 : x
2. Step 2: Convert to fraction form
   78,379.81/108,101.59 = 51,549.87/x
3. Step 3: Cross multiply
   78,379.81x = 108,101.59 × 51,549.87
4. Step 4: Simplify right side
   78,379.81x = 5,572,622,911.29
5. Step 5: Solve for x
   x = 5,572,622,911.29/78,379.81
6. Step 6: Final answer
   x = 71,097.68