Finding the Fourth Proportional to 91,428.05, 137,148.15 and 35,268.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,428.05 : 137,148.15 = 35,268.72 : x
2. Step 2: Convert to fraction form
   91,428.05/137,148.15 = 35,268.72/x
3. Step 3: Cross multiply
   91,428.05x = 137,148.15 × 35,268.72
4. Step 4: Simplify right side
   91,428.05x = 4,837,039,700.87
5. Step 5: Solve for x
   x = 4,837,039,700.87/91,428.05
6. Step 6: Final answer
   x = 52,905.43