Finding the Fourth Proportional to 61,080.86, 91,564.91 and 42,369.71

Step by Step Solution

1. Step 1: Write the proportion equation
   61,080.86 : 91,564.91 = 42,369.71 : x
2. Step 2: Convert to fraction form
   61,080.86/91,564.91 = 42,369.71/x
3. Step 3: Cross multiply
   61,080.86x = 91,564.91 × 42,369.71
4. Step 4: Simplify right side
   61,080.86x = 3,879,578,310.45
5. Step 5: Solve for x
   x = 3,879,578,310.45/61,080.86
6. Step 6: Final answer
   x = 63,515.45