Finding the Fourth Proportional to 78,012.24, 107,656.34 and 42,201.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,012.24 : 107,656.34 = 42,201.72 : x
2. Step 2: Convert to fraction form
   78,012.24/107,656.34 = 42,201.72/x
3. Step 3: Cross multiply
   78,012.24x = 107,656.34 × 42,201.72
4. Step 4: Simplify right side
   78,012.24x = 4,543,282,716.90
5. Step 5: Solve for x
   x = 4,543,282,716.90/78,012.24
6. Step 6: Final answer
   x = 58,238.08