Finding the Fourth Proportional to 152,707.05, 210,728.61 and 84,723.30

Step by Step Solution

1. Step 1: Write the proportion equation
   152,707.05 : 210,728.61 = 84,723.30 : x
2. Step 2: Convert to fraction form
   152,707.05/210,728.61 = 84,723.30/x
3. Step 3: Cross multiply
   152,707.05x = 210,728.61 × 84,723.30
4. Step 4: Simplify right side
   152,707.05x = 17,853,623,243.61
5. Step 5: Solve for x
   x = 17,853,623,243.61/152,707.05
6. Step 6: Final answer
   x = 116,914.20