Finding the Fourth Proportional to 83,721.28, 125,459.04 and 42,111.04

Step by Step Solution

1. Step 1: Write the proportion equation
   83,721.28 : 125,459.04 = 42,111.04 : x
2. Step 2: Convert to fraction form
   83,721.28/125,459.04 = 42,111.04/x
3. Step 3: Cross multiply
   83,721.28x = 125,459.04 × 42,111.04
4. Step 4: Simplify right side
   83,721.28x = 5,283,210,651.80
5. Step 5: Solve for x
   x = 5,283,210,651.80/83,721.28
6. Step 6: Final answer
   x = 63,104.75