Finding the Fourth Proportional to 42,780.69, 63,806.51 and 40,101.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,780.69 : 63,806.51 = 40,101.57 : x
2. Step 2: Convert to fraction form
   42,780.69/63,806.51 = 40,101.57/x
3. Step 3: Cross multiply
   42,780.69x = 63,806.51 × 40,101.57
4. Step 4: Simplify right side
   42,780.69x = 2,558,741,327.47
5. Step 5: Solve for x
   x = 2,558,741,327.47/42,780.69
6. Step 6: Final answer
   x = 59,810.66