Finding the Fourth Proportional to 128,061.84, 176,748.47 and 76,382.25

Step by Step Solution

1. Step 1: Write the proportion equation
   128,061.84 : 176,748.47 = 76,382.25 : x
2. Step 2: Convert to fraction form
   128,061.84/176,748.47 = 76,382.25/x
3. Step 3: Cross multiply
   128,061.84x = 176,748.47 × 76,382.25
4. Step 4: Simplify right side
   128,061.84x = 13,500,445,822.66
5. Step 5: Solve for x
   x = 13,500,445,822.66/128,061.84
6. Step 6: Final answer
   x = 105,421.30