Finding the Fourth Proportional to 78,286.76, 108,032.56 and 42,475.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,286.76 : 108,032.56 = 42,475.40 : x
2. Step 2: Convert to fraction form
   78,286.76/108,032.56 = 42,475.40/x
3. Step 3: Cross multiply
   78,286.76x = 108,032.56 × 42,475.40
4. Step 4: Simplify right side
   78,286.76x = 4,588,726,199.02
5. Step 5: Solve for x
   x = 4,588,726,199.02/78,286.76
6. Step 6: Final answer
   x = 58,614.33