Finding the Fourth Proportional to 91,612.27, 137,438.03 and 28,431.01

Step by Step Solution

1. Step 1: Write the proportion equation
   91,612.27 : 137,438.03 = 28,431.01 : x
2. Step 2: Convert to fraction form
   91,612.27/137,438.03 = 28,431.01/x
3. Step 3: Cross multiply
   91,612.27x = 137,438.03 × 28,431.01
4. Step 4: Simplify right side
   91,612.27x = 3,907,502,005.31
5. Step 5: Solve for x
   x = 3,907,502,005.31/91,612.27
6. Step 6: Final answer
   x = 42,652.61