Finding the Fourth Proportional to 78,322.50, 108,174.15 and 53,128.26

Step by Step Solution

1. Step 1: Write the proportion equation
   78,322.50 : 108,174.15 = 53,128.26 : x
2. Step 2: Convert to fraction form
   78,322.50/108,174.15 = 53,128.26/x
3. Step 3: Cross multiply
   78,322.50x = 108,174.15 × 53,128.26
4. Step 4: Simplify right side
   78,322.50x = 5,747,104,366.48
5. Step 5: Solve for x
   x = 5,747,104,366.48/78,322.50
6. Step 6: Final answer
   x = 73,377.44