Finding the Fourth Proportional to 78,513.15, 108,388.20 and 53,153.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,513.15 : 108,388.20 = 53,153.53 : x
2. Step 2: Convert to fraction form
   78,513.15/108,388.20 = 53,153.53/x
3. Step 3: Cross multiply
   78,513.15x = 108,388.20 × 53,153.53
4. Step 4: Simplify right side
   78,513.15x = 5,761,215,440.35
5. Step 5: Solve for x
   x = 5,761,215,440.35/78,513.15
6. Step 6: Final answer
   x = 73,378.99