Finding the Fourth Proportional to 76,368.15, 105,388.61 and 42,376.77

Step by Step Solution

1. Step 1: Write the proportion equation
   76,368.15 : 105,388.61 = 42,376.77 : x
2. Step 2: Convert to fraction form
   76,368.15/105,388.61 = 42,376.77/x
3. Step 3: Cross multiply
   76,368.15x = 105,388.61 × 42,376.77
4. Step 4: Simplify right side
   76,368.15x = 4,466,028,886.59
5. Step 5: Solve for x
   x = 4,466,028,886.59/76,368.15
6. Step 6: Final answer
   x = 58,480.26