Finding the Fourth Proportional to 78,700.42, 108,603.42 and 42,889.67

Step by Step Solution

1. Step 1: Write the proportion equation
   78,700.42 : 108,603.42 = 42,889.67 : x
2. Step 2: Convert to fraction form
   78,700.42/108,603.42 = 42,889.67/x
3. Step 3: Cross multiply
   78,700.42x = 108,603.42 × 42,889.67
4. Step 4: Simplify right side
   78,700.42x = 4,657,964,844.67
5. Step 5: Solve for x
   x = 4,657,964,844.67/78,700.42
6. Step 6: Final answer
   x = 59,186.02