Finding the Fourth Proportional to 91,870.47, 137,825.35 and 31,900.80

Step by Step Solution

1. Step 1: Write the proportion equation
   91,870.47 : 137,825.35 = 31,900.80 : x
2. Step 2: Convert to fraction form
   91,870.47/137,825.35 = 31,900.80/x
3. Step 3: Cross multiply
   91,870.47x = 137,825.35 × 31,900.80
4. Step 4: Simplify right side
   91,870.47x = 4,396,739,362.37
5. Step 5: Solve for x
   x = 4,396,739,362.37/91,870.47
6. Step 6: Final answer
   x = 47,858.03