Finding the Fourth Proportional to 64,751.78, 89,326.40 and 42,097.88

Step by Step Solution

1. Step 1: Write the proportion equation
   64,751.78 : 89,326.40 = 42,097.88 : x
2. Step 2: Convert to fraction form
   64,751.78/89,326.40 = 42,097.88/x
3. Step 3: Cross multiply
   64,751.78x = 89,326.40 × 42,097.88
4. Step 4: Simplify right side
   64,751.78x = 3,760,452,068.03
5. Step 5: Solve for x
   x = 3,760,452,068.03/64,751.78
6. Step 6: Final answer
   x = 58,074.88