Finding the Fourth Proportional to 73,978.50, 102,094.42 and 42,141.30

Step by Step Solution

1. Step 1: Write the proportion equation
   73,978.50 : 102,094.42 = 42,141.30 : x
2. Step 2: Convert to fraction form
   73,978.50/102,094.42 = 42,141.30/x
3. Step 3: Cross multiply
   73,978.50x = 102,094.42 × 42,141.30
4. Step 4: Simplify right side
   73,978.50x = 4,302,391,581.55
5. Step 5: Solve for x
   x = 4,302,391,581.55/73,978.50
6. Step 6: Final answer
   x = 58,157.32