Finding the Fourth Proportional to 90,847.97, 136,290.18 and 31,667.75

Step by Step Solution

1. Step 1: Write the proportion equation
   90,847.97 : 136,290.18 = 31,667.75 : x
2. Step 2: Convert to fraction form
   90,847.97/136,290.18 = 31,667.75/x
3. Step 3: Cross multiply
   90,847.97x = 136,290.18 × 31,667.75
4. Step 4: Simplify right side
   90,847.97x = 4,316,003,347.70
5. Step 5: Solve for x
   x = 4,316,003,347.70/90,847.97
6. Step 6: Final answer
   x = 47,507.98