Finding the Fourth Proportional to 152,868.72, 210,959.76 and 84,886.80

Step by Step Solution

1. Step 1: Write the proportion equation
   152,868.72 : 210,959.76 = 84,886.80 : x
2. Step 2: Convert to fraction form
   152,868.72/210,959.76 = 84,886.80/x
3. Step 3: Cross multiply
   152,868.72x = 210,959.76 × 84,886.80
4. Step 4: Simplify right side
   152,868.72x = 17,907,698,955.17
5. Step 5: Solve for x
   x = 17,907,698,955.17/152,868.72
6. Step 6: Final answer
   x = 117,144.30