Finding the Fourth Proportional to 64,215.60, 88,578.78 and 42,412.01

Step by Step Solution

1. Step 1: Write the proportion equation
   64,215.60 : 88,578.78 = 42,412.01 : x
2. Step 2: Convert to fraction form
   64,215.60/88,578.78 = 42,412.01/x
3. Step 3: Cross multiply
   64,215.60x = 88,578.78 × 42,412.01
4. Step 4: Simplify right side
   64,215.60x = 3,756,804,103.15
5. Step 5: Solve for x
   x = 3,756,804,103.15/64,215.60
6. Step 6: Final answer
   x = 58,502.98