Finding the Fourth Proportional to 73,921.08, 102,012 and 42,090

Step by Step Solution

1. Step 1: Write the proportion equation
   73,921.08 : 102,012 = 42,090 : x
2. Step 2: Convert to fraction form
   73,921.08/102,012 = 42,090/x
3. Step 3: Cross multiply
   73,921.08x = 102,012 × 42,090
4. Step 4: Simplify right side
   73,921.08x = 4,293,685,080
5. Step 5: Solve for x
   x = 4,293,685,080/73,921.08
6. Step 6: Final answer
   x = 58,084.72