Finding the Fourth Proportional to 91,003.10, 136,468.20 and 31,808.30

Step by Step Solution

1. Step 1: Write the proportion equation
   91,003.10 : 136,468.20 = 31,808.30 : x
2. Step 2: Convert to fraction form
   91,003.10/136,468.20 = 31,808.30/x
3. Step 3: Cross multiply
   91,003.10x = 136,468.20 × 31,808.30
4. Step 4: Simplify right side
   91,003.10x = 4,340,821,446.06
5. Step 5: Solve for x
   x = 4,340,821,446.06/91,003.10
6. Step 6: Final answer
   x = 47,699.71