Finding the Fourth Proportional to 83,689.72, 115,490.54 and 47,888.52

Step by Step Solution

1. Step 1: Write the proportion equation
   83,689.72 : 115,490.54 = 47,888.52 : x
2. Step 2: Convert to fraction form
   83,689.72/115,490.54 = 47,888.52/x
3. Step 3: Cross multiply
   83,689.72x = 115,490.54 × 47,888.52
4. Step 4: Simplify right side
   83,689.72x = 5,530,671,034.60
5. Step 5: Solve for x
   x = 5,530,671,034.60/83,689.72
6. Step 6: Final answer
   x = 66,085.43