Finding the Fourth Proportional to 66,123.82, 91,201.56 and 43,158.70

Step by Step Solution

1. Step 1: Write the proportion equation
   66,123.82 : 91,201.56 = 43,158.70 : x
2. Step 2: Convert to fraction form
   66,123.82/91,201.56 = 43,158.70/x
3. Step 3: Cross multiply
   66,123.82x = 91,201.56 × 43,158.70
4. Step 4: Simplify right side
   66,123.82x = 3,936,140,767.57
5. Step 5: Solve for x
   x = 3,936,140,767.57/66,123.82
6. Step 6: Final answer
   x = 59,526.82