Finding the Fourth Proportional to 73,978.30, 102,047.61 and 42,141.25

Step by Step Solution

1. Step 1: Write the proportion equation
   73,978.30 : 102,047.61 = 42,141.25 : x
2. Step 2: Convert to fraction form
   73,978.30/102,047.61 = 42,141.25/x
3. Step 3: Cross multiply
   73,978.30x = 102,047.61 × 42,141.25
4. Step 4: Simplify right side
   73,978.30x = 4,300,413,844.91
5. Step 5: Solve for x
   x = 4,300,413,844.91/73,978.30
6. Step 6: Final answer
   x = 58,130.75