Finding the Fourth Proportional to 78,355.02, 108,126.89 and 42,544.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,355.02 : 108,126.89 = 42,544.21 : x
2. Step 2: Convert to fraction form
   78,355.02/108,126.89 = 42,544.21/x
3. Step 3: Cross multiply
   78,355.02x = 108,126.89 × 42,544.21
4. Step 4: Simplify right side
   78,355.02x = 4,600,173,114.81
5. Step 5: Solve for x
   x = 4,600,173,114.81/78,355.02
6. Step 6: Final answer
   x = 58,709.36