Finding the Fourth Proportional to 76,307.76, 105,304.50 and 42,315.36

Step by Step Solution

1. Step 1: Write the proportion equation
   76,307.76 : 105,304.50 = 42,315.36 : x
2. Step 2: Convert to fraction form
   76,307.76/105,304.50 = 42,315.36/x
3. Step 3: Cross multiply
   76,307.76x = 105,304.50 × 42,315.36
4. Step 4: Simplify right side
   76,307.76x = 4,455,997,827.12
5. Step 5: Solve for x
   x = 4,455,997,827.12/76,307.76
6. Step 6: Final answer
   x = 58,395.08