Finding the Fourth Proportional to 76,587.02, 105,689.49 and 42,131.01

Step by Step Solution

1. Step 1: Write the proportion equation
   76,587.02 : 105,689.49 = 42,131.01 : x
2. Step 2: Convert to fraction form
   76,587.02/105,689.49 = 42,131.01/x
3. Step 3: Cross multiply
   76,587.02x = 105,689.49 × 42,131.01
4. Step 4: Simplify right side
   76,587.02x = 4,452,804,721.74
5. Step 5: Solve for x
   x = 4,452,804,721.74/76,587.02
6. Step 6: Final answer
   x = 58,140.46