Finding the Fourth Proportional to 78,725.42, 108,640.18 and 42,914.64

Step by Step Solution

1. Step 1: Write the proportion equation
   78,725.42 : 108,640.18 = 42,914.64 : x
2. Step 2: Convert to fraction form
   78,725.42/108,640.18 = 42,914.64/x
3. Step 3: Cross multiply
   78,725.42x = 108,640.18 × 42,914.64
4. Step 4: Simplify right side
   78,725.42x = 4,662,254,214.24
5. Step 5: Solve for x
   x = 4,662,254,214.24/78,725.42
6. Step 6: Final answer
   x = 59,221.71