Finding the Fourth Proportional to 151,838.16, 209,536.80 and 84,770.16

Step by Step Solution

1. Step 1: Write the proportion equation
   151,838.16 : 209,536.80 = 84,770.16 : x
2. Step 2: Convert to fraction form
   151,838.16/209,536.80 = 84,770.16/x
3. Step 3: Cross multiply
   151,838.16x = 209,536.80 × 84,770.16
4. Step 4: Simplify right side
   151,838.16x = 17,762,468,061.89
5. Step 5: Solve for x
   x = 17,762,468,061.89/151,838.16
6. Step 6: Final answer
   x = 116,982.90