Finding the Fourth Proportional to 142,981.77, 214,538.27 and 72,910.29

Step by Step Solution

1. Step 1: Write the proportion equation
   142,981.77 : 214,538.27 = 72,910.29 : x
2. Step 2: Convert to fraction form
   142,981.77/214,538.27 = 72,910.29/x
3. Step 3: Cross multiply
   142,981.77x = 214,538.27 × 72,910.29
4. Step 4: Simplify right side
   142,981.77x = 15,642,047,117.25
5. Step 5: Solve for x
   x = 15,642,047,117.25/142,981.77
6. Step 6: Final answer
   x = 109,398.89