Finding the Fourth Proportional to 42,386.74, 63,603.15 and 17,780.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,386.74 : 63,603.15 = 17,780.02 : x
2. Step 2: Convert to fraction form
   42,386.74/63,603.15 = 17,780.02/x
3. Step 3: Cross multiply
   42,386.74x = 63,603.15 × 17,780.02
4. Step 4: Simplify right side
   42,386.74x = 1,130,865,279.06
5. Step 5: Solve for x
   x = 1,130,865,279.06/42,386.74
6. Step 6: Final answer
   x = 26,679.69