Finding the Fourth Proportional to 76,513.53, 105,586.56 and 42,521.16

Step by Step Solution

1. Step 1: Write the proportion equation
   76,513.53 : 105,586.56 = 42,521.16 : x
2. Step 2: Convert to fraction form
   76,513.53/105,586.56 = 42,521.16/x
3. Step 3: Cross multiply
   76,513.53x = 105,586.56 × 42,521.16
4. Step 4: Simplify right side
   76,513.53x = 4,489,662,271.07
5. Step 5: Solve for x
   x = 4,489,662,271.07/76,513.53
6. Step 6: Final answer
   x = 58,678.02