Finding the Fourth Proportional to 90,886.86, 136,369.98 and 31,764.96

Step by Step Solution

1. Step 1: Write the proportion equation
   90,886.86 : 136,369.98 = 31,764.96 : x
2. Step 2: Convert to fraction form
   90,886.86/136,369.98 = 31,764.96/x
3. Step 3: Cross multiply
   90,886.86x = 136,369.98 × 31,764.96
4. Step 4: Simplify right side
   90,886.86x = 4,331,786,959.90
5. Step 5: Solve for x
   x = 4,331,786,959.90/90,886.86
6. Step 6: Final answer
   x = 47,661.31