Finding the Fourth Proportional to 73,979.50, 102,095.80 and 42,142.30

Step by Step Solution

1. Step 1: Write the proportion equation
   73,979.50 : 102,095.80 = 42,142.30 : x
2. Step 2: Convert to fraction form
   73,979.50/102,095.80 = 42,142.30/x
3. Step 3: Cross multiply
   73,979.50x = 102,095.80 × 42,142.30
4. Step 4: Simplify right side
   73,979.50x = 4,302,551,832.34
5. Step 5: Solve for x
   x = 4,302,551,832.34/73,979.50
6. Step 6: Final answer
   x = 58,158.70