Finding the Fourth Proportional to 76,488.72, 105,553.80 and 42,954

Step by Step Solution

1. Step 1: Write the proportion equation
   76,488.72 : 105,553.80 = 42,954 : x
2. Step 2: Convert to fraction form
   76,488.72/105,553.80 = 42,954/x
3. Step 3: Cross multiply
   76,488.72x = 105,553.80 × 42,954
4. Step 4: Simplify right side
   76,488.72x = 4,533,957,925.20
5. Step 5: Solve for x
   x = 4,533,957,925.20/76,488.72
6. Step 6: Final answer
   x = 59,276.16