Finding the Fourth Proportional to 76,719.52, 115,085.52 and 21,315.52

Step by Step Solution

1. Step 1: Write the proportion equation
   76,719.52 : 115,085.52 = 21,315.52 : x
2. Step 2: Convert to fraction form
   76,719.52/115,085.52 = 21,315.52/x
3. Step 3: Cross multiply
   76,719.52x = 115,085.52 × 21,315.52
4. Step 4: Simplify right side
   76,719.52x = 2,453,107,703.27
5. Step 5: Solve for x
   x = 2,453,107,703.27/76,719.52
6. Step 6: Final answer
   x = 31,975.01