Finding the Fourth Proportional to 139,985.88, 193,119.78 and 88,971.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,985.88 : 193,119.78 = 88,971.32 : x
2. Step 2: Convert to fraction form
   139,985.88/193,119.78 = 88,971.32/x
3. Step 3: Cross multiply
   139,985.88x = 193,119.78 × 88,971.32
4. Step 4: Simplify right side
   139,985.88x = 17,182,121,744.71
5. Step 5: Solve for x
   x = 17,182,121,744.71/139,985.88
6. Step 6: Final answer
   x = 122,741.82