Finding the Fourth Proportional to 78,700.83, 108,607.29 and 42,890.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,700.83 : 108,607.29 = 42,890.84 : x
2. Step 2: Convert to fraction form
   78,700.83/108,607.29 = 42,890.84/x
3. Step 3: Cross multiply
   78,700.83x = 108,607.29 × 42,890.84
4. Step 4: Simplify right side
   78,700.83x = 4,658,257,355.19
5. Step 5: Solve for x
   x = 4,658,257,355.19/78,700.83
6. Step 6: Final answer
   x = 59,189.43