Finding the Fourth Proportional to 76,485.02, 105,549.21 and 42,496.63

Step by Step Solution

1. Step 1: Write the proportion equation
   76,485.02 : 105,549.21 = 42,496.63 : x
2. Step 2: Convert to fraction form
   76,485.02/105,549.21 = 42,496.63/x
3. Step 3: Cross multiply
   76,485.02x = 105,549.21 × 42,496.63
4. Step 4: Simplify right side
   76,485.02x = 4,485,485,460.29
5. Step 5: Solve for x
   x = 4,485,485,460.29/76,485.02
6. Step 6: Final answer
   x = 58,645.28