Finding the Fourth Proportional to 90,870.95, 136,296.71 and 31,707.74

Step by Step Solution

1. Step 1: Write the proportion equation
   90,870.95 : 136,296.71 = 31,707.74 : x
2. Step 2: Convert to fraction form
   90,870.95/136,296.71 = 31,707.74/x
3. Step 3: Cross multiply
   90,870.95x = 136,296.71 × 31,707.74
4. Step 4: Simplify right side
   90,870.95x = 4,321,660,643.54
5. Step 5: Solve for x
   x = 4,321,660,643.54/90,870.95
6. Step 6: Final answer
   x = 47,558.22