Finding the Fourth Proportional to 78,380.40, 108,164.52 and 42,570.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,380.40 : 108,164.52 = 42,570.12 : x
2. Step 2: Convert to fraction form
   78,380.40/108,164.52 = 42,570.12/x
3. Step 3: Cross multiply
   78,380.40x = 108,164.52 × 42,570.12
4. Step 4: Simplify right side
   78,380.40x = 4,604,576,596.14
5. Step 5: Solve for x
   x = 4,604,576,596.14/78,380.40
6. Step 6: Final answer
   x = 58,746.53