Finding the Fourth Proportional to 65,046.72, 89,779.47 and 42,346.17

Step by Step Solution

1. Step 1: Write the proportion equation
   65,046.72 : 89,779.47 = 42,346.17 : x
2. Step 2: Convert to fraction form
   65,046.72/89,779.47 = 42,346.17/x
3. Step 3: Cross multiply
   65,046.72x = 89,779.47 × 42,346.17
4. Step 4: Simplify right side
   65,046.72x = 3,801,816,699.13
5. Step 5: Solve for x
   x = 3,801,816,699.13/65,046.72
6. Step 6: Final answer
   x = 58,447.48