Finding the Fourth Proportional to 93,312.72, 128,788.10 and 55,069.52

Step by Step Solution

1. Step 1: Write the proportion equation
   93,312.72 : 128,788.10 = 55,069.52 : x
2. Step 2: Convert to fraction form
   93,312.72/128,788.10 = 55,069.52/x
3. Step 3: Cross multiply
   93,312.72x = 128,788.10 × 55,069.52
4. Step 4: Simplify right side
   93,312.72x = 7,092,297,929.42
5. Step 5: Solve for x
   x = 7,092,297,929.42/93,312.72
6. Step 6: Final answer
   x = 76,005.69