Finding the Fourth Proportional to 142,931.06, 214,110.71 and 85,973.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,931.06 : 214,110.71 = 85,973.52 : x
2. Step 2: Convert to fraction form
   142,931.06/214,110.71 = 85,973.52/x
3. Step 3: Cross multiply
   142,931.06x = 214,110.71 × 85,973.52
4. Step 4: Simplify right side
   142,931.06x = 18,407,850,552.78
5. Step 5: Solve for x
   x = 18,407,850,552.78/142,931.06
6. Step 6: Final answer
   x = 128,788.31