Finding the Fourth Proportional to 152,651.30, 210,669 and 84,689.87

Step by Step Solution

1. Step 1: Write the proportion equation
   152,651.30 : 210,669 = 84,689.87 : x
2. Step 2: Convert to fraction form
   152,651.30/210,669 = 84,689.87/x
3. Step 3: Cross multiply
   152,651.30x = 210,669 × 84,689.87
4. Step 4: Simplify right side
   152,651.30x = 17,841,530,223.03
5. Step 5: Solve for x
   x = 17,841,530,223.03/152,651.30
6. Step 6: Final answer
   x = 116,877.68