Finding the Fourth Proportional to 52,688.88, 79,066.52 and 38,430.80

Step by Step Solution

1. Step 1: Write the proportion equation
   52,688.88 : 79,066.52 = 38,430.80 : x
2. Step 2: Convert to fraction form
   52,688.88/79,066.52 = 38,430.80/x
3. Step 3: Cross multiply
   52,688.88x = 79,066.52 × 38,430.80
4. Step 4: Simplify right side
   52,688.88x = 3,038,589,616.82
5. Step 5: Solve for x
   x = 3,038,589,616.82/52,688.88
6. Step 6: Final answer
   x = 57,670.42