Finding the Fourth Proportional to 76,513.63, 105,588.71 and 42,521.04

Step by Step Solution

1. Step 1: Write the proportion equation
   76,513.63 : 105,588.71 = 42,521.04 : x
2. Step 2: Convert to fraction form
   76,513.63/105,588.71 = 42,521.04/x
3. Step 3: Cross multiply
   76,513.63x = 105,588.71 × 42,521.04
4. Step 4: Simplify right side
   76,513.63x = 4,489,741,867.76
5. Step 5: Solve for x
   x = 4,489,741,867.76/76,513.63
6. Step 6: Final answer
   x = 58,678.98