Finding the Fourth Proportional to 76,617.90, 105,733.35 and 42,630.30

Step by Step Solution

1. Step 1: Write the proportion equation
   76,617.90 : 105,733.35 = 42,630.30 : x
2. Step 2: Convert to fraction form
   76,617.90/105,733.35 = 42,630.30/x
3. Step 3: Cross multiply
   76,617.90x = 105,733.35 × 42,630.30
4. Step 4: Simplify right side
   76,617.90x = 4,507,444,430.51
5. Step 5: Solve for x
   x = 4,507,444,430.51/76,617.90
6. Step 6: Final answer
   x = 58,830.17