Finding the Fourth Proportional to 78,700.35, 108,606.51 and 42,890.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,700.35 : 108,606.51 = 42,890.34 : x
2. Step 2: Convert to fraction form
   78,700.35/108,606.51 = 42,890.34/x
3. Step 3: Cross multiply
   78,700.35x = 108,606.51 × 42,890.34
4. Step 4: Simplify right side
   78,700.35x = 4,658,170,140.11
5. Step 5: Solve for x
   x = 4,658,170,140.11/78,700.35
6. Step 6: Final answer
   x = 59,188.68