Finding the Fourth Proportional to 90,953.42, 136,492.54 and 31,789.13

Step by Step Solution

1. Step 1: Write the proportion equation
   90,953.42 : 136,492.54 = 31,789.13 : x
2. Step 2: Convert to fraction form
   90,953.42/136,492.54 = 31,789.13/x
3. Step 3: Cross multiply
   90,953.42x = 136,492.54 × 31,789.13
4. Step 4: Simplify right side
   90,953.42x = 4,338,978,336.15
5. Step 5: Solve for x
   x = 4,338,978,336.15/90,953.42
6. Step 6: Final answer
   x = 47,705.50