Finding the Fourth Proportional to 90,986.29, 136,451.89 and 31,810.93

Step by Step Solution

1. Step 1: Write the proportion equation
   90,986.29 : 136,451.89 = 31,810.93 : x
2. Step 2: Convert to fraction form
   90,986.29/136,451.89 = 31,810.93/x
3. Step 3: Cross multiply
   90,986.29x = 136,451.89 × 31,810.93
4. Step 4: Simplify right side
   90,986.29x = 4,340,661,521.16
5. Step 5: Solve for x
   x = 4,340,661,521.16/90,986.29
6. Step 6: Final answer
   x = 47,706.76