Finding the Fourth Proportional to 139,066.88, 191,912.12 and 75,404.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,066.88 : 191,912.12 = 75,404.60 : x
2. Step 2: Convert to fraction form
   139,066.88/191,912.12 = 75,404.60/x
3. Step 3: Cross multiply
   139,066.88x = 191,912.12 × 75,404.60
4. Step 4: Simplify right side
   139,066.88x = 14,471,056,643.75
5. Step 5: Solve for x
   x = 14,471,056,643.75/139,066.88
6. Step 6: Final answer
   x = 104,058.25