Finding the Fourth Proportional to 140,070.59, 193,298.81 and 76,409.72

Step by Step Solution

1. Step 1: Write the proportion equation
   140,070.59 : 193,298.81 = 76,409.72 : x
2. Step 2: Convert to fraction form
   140,070.59/193,298.81 = 76,409.72/x
3. Step 3: Cross multiply
   140,070.59x = 193,298.81 × 76,409.72
4. Step 4: Simplify right side
   140,070.59x = 14,769,906,599.89
5. Step 5: Solve for x
   x = 14,769,906,599.89/140,070.59
6. Step 6: Final answer
   x = 105,446.17