Finding the Fourth Proportional to 42,261, 63,392.40 and 15,978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,261 : 63,392.40 = 15,978.12 : x
2. Step 2: Convert to fraction form
   42,261/63,392.40 = 15,978.12/x
3. Step 3: Cross multiply
   42,261x = 63,392.40 × 15,978.12
4. Step 4: Simplify right side
   42,261x = 1,012,891,374.29
5. Step 5: Solve for x
   x = 1,012,891,374.29/42,261
6. Step 6: Final answer
   x = 23,967.52