Finding the Fourth Proportional to 76,291.52, 105,287.61 and 42,303.15

Step by Step Solution

1. Step 1: Write the proportion equation
   76,291.52 : 105,287.61 = 42,303.15 : x
2. Step 2: Convert to fraction form
   76,291.52/105,287.61 = 42,303.15/x
3. Step 3: Cross multiply
   76,291.52x = 105,287.61 × 42,303.15
4. Step 4: Simplify right side
   76,291.52x = 4,453,997,656.80
5. Step 5: Solve for x
   x = 4,453,997,656.80/76,291.52
6. Step 6: Final answer
   x = 58,381.29