Finding the Fourth Proportional to 128,061.09, 176,747.43 and 76,381.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,061.09 : 176,747.43 = 76,381.50 : x
2. Step 2: Convert to fraction form
   128,061.09/176,747.43 = 76,381.50/x
3. Step 3: Cross multiply
   128,061.09x = 176,747.43 × 76,381.50
4. Step 4: Simplify right side
   128,061.09x = 13,500,233,824.55
5. Step 5: Solve for x
   x = 13,500,233,824.55/128,061.09
6. Step 6: Final answer
   x = 105,420.26