Finding the Fourth Proportional to 78,419.45, 108,216.44 and 42,608.70

Step by Step Solution

1. Step 1: Write the proportion equation
   78,419.45 : 108,216.44 = 42,608.70 : x
2. Step 2: Convert to fraction form
   78,419.45/108,216.44 = 42,608.70/x
3. Step 3: Cross multiply
   78,419.45x = 108,216.44 × 42,608.70
4. Step 4: Simplify right side
   78,419.45x = 4,610,961,773.77
5. Step 5: Solve for x
   x = 4,610,961,773.77/78,419.45
6. Step 6: Final answer
   x = 58,798.70