Finding the Fourth Proportional to 139,030.12, 191,859.78 and 75,367.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,030.12 : 191,859.78 = 75,367.72 : x
2. Step 2: Convert to fraction form
   139,030.12/191,859.78 = 75,367.72/x
3. Step 3: Cross multiply
   139,030.12x = 191,859.78 × 75,367.72
4. Step 4: Simplify right side
   139,030.12x = 14,460,034,178.30
5. Step 5: Solve for x
   x = 14,460,034,178.30/139,030.12
6. Step 6: Final answer
   x = 104,006.49