Finding the Fourth Proportional to 65,316.16, 90,109.48 and 42,647.32

Step by Step Solution

1. Step 1: Write the proportion equation
   65,316.16 : 90,109.48 = 42,647.32 : x
2. Step 2: Convert to fraction form
   65,316.16/90,109.48 = 42,647.32/x
3. Step 3: Cross multiply
   65,316.16x = 90,109.48 × 42,647.32
4. Step 4: Simplify right side
   65,316.16x = 3,842,927,828.59
5. Step 5: Solve for x
   x = 3,842,927,828.59/65,316.16
6. Step 6: Final answer
   x = 58,835.79