Finding the Fourth Proportional to 152,405.52, 210,320.24 and 84,421

Step by Step Solution

1. Step 1: Write the proportion equation
   152,405.52 : 210,320.24 = 84,421 : x
2. Step 2: Convert to fraction form
   152,405.52/210,320.24 = 84,421/x
3. Step 3: Cross multiply
   152,405.52x = 210,320.24 × 84,421
4. Step 4: Simplify right side
   152,405.52x = 17,755,444,981.04
5. Step 5: Solve for x
   x = 17,755,444,981.04/152,405.52
6. Step 6: Final answer
   x = 116,501.32