Finding the Fourth Proportional to 139,988.09, 193,200.21 and 88,380.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,988.09 : 193,200.21 = 88,380.16 : x
2. Step 2: Convert to fraction form
   139,988.09/193,200.21 = 88,380.16/x
3. Step 3: Cross multiply
   139,988.09x = 193,200.21 × 88,380.16
4. Step 4: Simplify right side
   139,988.09x = 17,075,064,988.83
5. Step 5: Solve for x
   x = 17,075,064,988.83/139,988.09
6. Step 6: Final answer
   x = 121,975.12