Finding the Fourth Proportional to 91,041.60, 136,471.56 and 43,569.12

Step by Step Solution

1. Step 1: Write the proportion equation
   91,041.60 : 136,471.56 = 43,569.12 : x
2. Step 2: Convert to fraction form
   91,041.60/136,471.56 = 43,569.12/x
3. Step 3: Cross multiply
   91,041.60x = 136,471.56 × 43,569.12
4. Step 4: Simplify right side
   91,041.60x = 5,945,945,774.23
5. Step 5: Solve for x
   x = 5,945,945,774.23/91,041.60
6. Step 6: Final answer
   x = 65,310.21