Finding the Fourth Proportional to 58,752.78, 88,128.78 and 14,380.20

Step by Step Solution

1. Step 1: Write the proportion equation
   58,752.78 : 88,128.78 = 14,380.20 : x
2. Step 2: Convert to fraction form
   58,752.78/88,128.78 = 14,380.20/x
3. Step 3: Cross multiply
   58,752.78x = 88,128.78 × 14,380.20
4. Step 4: Simplify right side
   58,752.78x = 1,267,309,482.16
5. Step 5: Solve for x
   x = 1,267,309,482.16/58,752.78
6. Step 6: Final answer
   x = 21,570.20