Finding the Fourth Proportional to 76,294.32, 105,289.52 and 42,300.64

Step by Step Solution

1. Step 1: Write the proportion equation
   76,294.32 : 105,289.52 = 42,300.64 : x
2. Step 2: Convert to fraction form
   76,294.32/105,289.52 = 42,300.64/x
3. Step 3: Cross multiply
   76,294.32x = 105,289.52 × 42,300.64
4. Step 4: Simplify right side
   76,294.32x = 4,453,814,081.29
5. Step 5: Solve for x
   x = 4,453,814,081.29/76,294.32
6. Step 6: Final answer
   x = 58,376.75