Finding the Fourth Proportional to 52,784.77, 78,780.71 and 45,637.39

Step by Step Solution

1. Step 1: Write the proportion equation
   52,784.77 : 78,780.71 = 45,637.39 : x
2. Step 2: Convert to fraction form
   52,784.77/78,780.71 = 45,637.39/x
3. Step 3: Cross multiply
   52,784.77x = 78,780.71 × 45,637.39
4. Step 4: Simplify right side
   52,784.77x = 3,595,345,986.75
5. Step 5: Solve for x
   x = 3,595,345,986.75/52,784.77
6. Step 6: Final answer
   x = 68,113.32