Finding the Fourth Proportional to 76,111.40, 105,031.36 and 42,117.84

Step by Step Solution

1. Step 1: Write the proportion equation
   76,111.40 : 105,031.36 = 42,117.84 : x
2. Step 2: Convert to fraction form
   76,111.40/105,031.36 = 42,117.84/x
3. Step 3: Cross multiply
   76,111.40x = 105,031.36 × 42,117.84
4. Step 4: Simplify right side
   76,111.40x = 4,423,694,015.46
5. Step 5: Solve for x
   x = 4,423,694,015.46/76,111.40
6. Step 6: Final answer
   x = 58,121.31