Finding the Fourth Proportional to 91,431.39, 137,147.10 and 38,803.98

Step by Step Solution

1. Step 1: Write the proportion equation
   91,431.39 : 137,147.10 = 38,803.98 : x
2. Step 2: Convert to fraction form
   91,431.39/137,147.10 = 38,803.98/x
3. Step 3: Cross multiply
   91,431.39x = 137,147.10 × 38,803.98
4. Step 4: Simplify right side
   91,431.39x = 5,321,853,325.46
5. Step 5: Solve for x
   x = 5,321,853,325.46/91,431.39
6. Step 6: Final answer
   x = 58,205.98