Finding the Fourth Proportional to 115,120.08, 172,667.64 and 30,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,120.08 : 172,667.64 = 30,888.72 : x
2. Step 2: Convert to fraction form
   115,120.08/172,667.64 = 30,888.72/x
3. Step 3: Cross multiply
   115,120.08x = 172,667.64 × 30,888.72
4. Step 4: Simplify right side
   115,120.08x = 5,333,482,385.02
5. Step 5: Solve for x
   x = 5,333,482,385.02/115,120.08
6. Step 6: Final answer
   x = 46,329.73