Finding the Fourth Proportional to 52,499.56, 78,720.16 and 17,420.08

Step by Step Solution

1. Step 1: Write the proportion equation
   52,499.56 : 78,720.16 = 17,420.08 : x
2. Step 2: Convert to fraction form
   52,499.56/78,720.16 = 17,420.08/x
3. Step 3: Cross multiply
   52,499.56x = 78,720.16 × 17,420.08
4. Step 4: Simplify right side
   52,499.56x = 1,371,311,484.81
5. Step 5: Solve for x
   x = 1,371,311,484.81/52,499.56
6. Step 6: Final answer
   x = 26,120.44