Finding the Fourth Proportional to 152,216.88, 210,059.64 and 84,238.80

Step by Step Solution

1. Step 1: Write the proportion equation
   152,216.88 : 210,059.64 = 84,238.80 : x
2. Step 2: Convert to fraction form
   152,216.88/210,059.64 = 84,238.80/x
3. Step 3: Cross multiply
   152,216.88x = 210,059.64 × 84,238.80
4. Step 4: Simplify right side
   152,216.88x = 17,695,172,002.03
5. Step 5: Solve for x
   x = 17,695,172,002.03/152,216.88
6. Step 6: Final answer
   x = 116,249.74