Finding the Fourth Proportional to 139,343.88, 208,962.33 and 59,331.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,343.88 : 208,962.33 = 59,331.12 : x
2. Step 2: Convert to fraction form
   139,343.88/208,962.33 = 59,331.12/x
3. Step 3: Cross multiply
   139,343.88x = 208,962.33 × 59,331.12
4. Step 4: Simplify right side
   139,343.88x = 12,397,969,076.71
5. Step 5: Solve for x
   x = 12,397,969,076.71/139,343.88
6. Step 6: Final answer
   x = 88,973.90