Finding the Fourth Proportional to 77,900.72, 116,766.84 and 31,102.16

Step by Step Solution

1. Step 1: Write the proportion equation
   77,900.72 : 116,766.84 = 31,102.16 : x
2. Step 2: Convert to fraction form
   77,900.72/116,766.84 = 31,102.16/x
3. Step 3: Cross multiply
   77,900.72x = 116,766.84 × 31,102.16
4. Step 4: Simplify right side
   77,900.72x = 3,631,700,940.37
5. Step 5: Solve for x
   x = 3,631,700,940.37/77,900.72
6. Step 6: Final answer
   x = 46,619.61