Finding the Fourth Proportional to 91,012.10, 136,427.43 and 43,539.62

Step by Step Solution

1. Step 1: Write the proportion equation
   91,012.10 : 136,427.43 = 43,539.62 : x
2. Step 2: Convert to fraction form
   91,012.10/136,427.43 = 43,539.62/x
3. Step 3: Cross multiply
   91,012.10x = 136,427.43 × 43,539.62
4. Step 4: Simplify right side
   91,012.10x = 5,939,998,459.78
5. Step 5: Solve for x
   x = 5,939,998,459.78/91,012.10
6. Step 6: Final answer
   x = 65,266.03