Finding the Fourth Proportional to 76,305.64, 105,298.86 and 42,315.52

Step by Step Solution

1. Step 1: Write the proportion equation
   76,305.64 : 105,298.86 = 42,315.52 : x
2. Step 2: Convert to fraction form
   76,305.64/105,298.86 = 42,315.52/x
3. Step 3: Cross multiply
   76,305.64x = 105,298.86 × 42,315.52
4. Step 4: Simplify right side
   76,305.64x = 4,455,776,016.31
5. Step 5: Solve for x
   x = 4,455,776,016.31/76,305.64
6. Step 6: Final answer
   x = 58,393.80