Finding the Fourth Proportional to 139,068.54, 191,914.74 and 75,406.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,068.54 : 191,914.74 = 75,406.50 : x
2. Step 2: Convert to fraction form
   139,068.54/191,914.74 = 75,406.50/x
3. Step 3: Cross multiply
   139,068.54x = 191,914.74 × 75,406.50
4. Step 4: Simplify right side
   139,068.54x = 14,471,618,841.81
5. Step 5: Solve for x
   x = 14,471,618,841.81/139,068.54
6. Step 6: Final answer
   x = 104,061.05