Finding the Fourth Proportional to 152,839.72, 210,921.30 and 84,861.08

Step by Step Solution

1. Step 1: Write the proportion equation
   152,839.72 : 210,921.30 = 84,861.08 : x
2. Step 2: Convert to fraction form
   152,839.72/210,921.30 = 84,861.08/x
3. Step 3: Cross multiply
   152,839.72x = 210,921.30 × 84,861.08
4. Step 4: Simplify right side
   152,839.72x = 17,899,009,049.35
5. Step 5: Solve for x
   x = 17,899,009,049.35/152,839.72
6. Step 6: Final answer
   x = 117,109.67