Finding the Fourth Proportional to 66,058.84, 91,155.18 and 39,196.72

Step by Step Solution

1. Step 1: Write the proportion equation
   66,058.84 : 91,155.18 = 39,196.72 : x
2. Step 2: Convert to fraction form
   66,058.84/91,155.18 = 39,196.72/x
3. Step 3: Cross multiply
   66,058.84x = 91,155.18 × 39,196.72
4. Step 4: Simplify right side
   66,058.84x = 3,572,984,067.01
5. Step 5: Solve for x
   x = 3,572,984,067.01/66,058.84
6. Step 6: Final answer
   x = 54,087.90