Finding the Fourth Proportional to 65,137.91, 89,818.93 and 42,434.80

Step by Step Solution

1. Step 1: Write the proportion equation
   65,137.91 : 89,818.93 = 42,434.80 : x
2. Step 2: Convert to fraction form
   65,137.91/89,818.93 = 42,434.80/x
3. Step 3: Cross multiply
   65,137.91x = 89,818.93 × 42,434.80
4. Step 4: Simplify right side
   65,137.91x = 3,811,448,056.71
5. Step 5: Solve for x
   x = 3,811,448,056.71/65,137.91
6. Step 6: Final answer
   x = 58,513.52