Finding the Fourth Proportional to 71,769.51, 99,069.48 and 53,916.30

Step by Step Solution

1. Step 1: Write the proportion equation
   71,769.51 : 99,069.48 = 53,916.30 : x
2. Step 2: Convert to fraction form
   71,769.51/99,069.48 = 53,916.30/x
3. Step 3: Cross multiply
   71,769.51x = 99,069.48 × 53,916.30
4. Step 4: Simplify right side
   71,769.51x = 5,341,459,804.52
5. Step 5: Solve for x
   x = 5,341,459,804.52/71,769.51
6. Step 6: Final answer
   x = 74,425.20