Finding the Fourth Proportional to 115,111.58, 172,655.35 and 30,880.76

Step by Step Solution

1. Step 1: Write the proportion equation
   115,111.58 : 172,655.35 = 30,880.76 : x
2. Step 2: Convert to fraction form
   115,111.58/172,655.35 = 30,880.76/x
3. Step 3: Cross multiply
   115,111.58x = 172,655.35 × 30,880.76
4. Step 4: Simplify right side
   115,111.58x = 5,331,727,485.59
5. Step 5: Solve for x
   x = 5,331,727,485.59/115,111.58
6. Step 6: Final answer
   x = 46,317.91