Finding the Fourth Proportional to 91,538.10, 137,321.93 and 28,343.37

Step by Step Solution

1. Step 1: Write the proportion equation
   91,538.10 : 137,321.93 = 28,343.37 : x
2. Step 2: Convert to fraction form
   91,538.10/137,321.93 = 28,343.37/x
3. Step 3: Cross multiply
   91,538.10x = 137,321.93 × 28,343.37
4. Step 4: Simplify right side
   91,538.10x = 3,892,166,084.48
5. Step 5: Solve for x
   x = 3,892,166,084.48/91,538.10
6. Step 6: Final answer
   x = 42,519.63