Finding the Fourth Proportional to 76,981.88, 106,228.93 and 42,987.71

Step by Step Solution

1. Step 1: Write the proportion equation
   76,981.88 : 106,228.93 = 42,987.71 : x
2. Step 2: Convert to fraction form
   76,981.88/106,228.93 = 42,987.71/x
3. Step 3: Cross multiply
   76,981.88x = 106,228.93 × 42,987.71
4. Step 4: Simplify right side
   76,981.88x = 4,566,538,436.45
5. Step 5: Solve for x
   x = 4,566,538,436.45/76,981.88
6. Step 6: Final answer
   x = 59,319.65