Finding the Fourth Proportional to 66,419.60, 91,655.70 and 37,735.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,419.60 : 91,655.70 = 37,735.50 : x
2. Step 2: Convert to fraction form
   66,419.60/91,655.70 = 37,735.50/x
3. Step 3: Cross multiply
   66,419.60x = 91,655.70 × 37,735.50
4. Step 4: Simplify right side
   66,419.60x = 3,458,673,667.35
5. Step 5: Solve for x
   x = 3,458,673,667.35/66,419.60
6. Step 6: Final answer
   x = 52,073.09