Finding the Fourth Proportional to 66,111.59, 91,211.47 and 42,252.03

Step by Step Solution

1. Step 1: Write the proportion equation
   66,111.59 : 91,211.47 = 42,252.03 : x
2. Step 2: Convert to fraction form
   66,111.59/91,211.47 = 42,252.03/x
3. Step 3: Cross multiply
   66,111.59x = 91,211.47 × 42,252.03
4. Step 4: Simplify right side
   66,111.59x = 3,853,869,661.15
5. Step 5: Solve for x
   x = 3,853,869,661.15/66,111.59
6. Step 6: Final answer
   x = 58,293.40