Finding the Fourth Proportional to 73,961.32, 102,066.50 and 42,130.20

Step by Step Solution

1. Step 1: Write the proportion equation
   73,961.32 : 102,066.50 = 42,130.20 : x
2. Step 2: Convert to fraction form
   73,961.32/102,066.50 = 42,130.20/x
3. Step 3: Cross multiply
   73,961.32x = 102,066.50 × 42,130.20
4. Step 4: Simplify right side
   73,961.32x = 4,300,082,058.30
5. Step 5: Solve for x
   x = 4,300,082,058.30/73,961.32
6. Step 6: Final answer
   x = 58,139.61