Finding the Fourth Proportional to 139,086.30, 191,939.15 and 75,424.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,086.30 : 191,939.15 = 75,424.08 : x
2. Step 2: Convert to fraction form
   139,086.30/191,939.15 = 75,424.08/x
3. Step 3: Cross multiply
   139,086.30x = 191,939.15 × 75,424.08
4. Step 4: Simplify right side
   139,086.30x = 14,476,833,427.61
5. Step 5: Solve for x
   x = 14,476,833,427.61/139,086.30
6. Step 6: Final answer
   x = 104,085.26