Finding the Fourth Proportional to 30,858.71, 42,585.15 and 17,430.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,858.71 : 42,585.15 = 17,430.12 : x
2. Step 2: Convert to fraction form
   30,858.71/42,585.15 = 17,430.12/x
3. Step 3: Cross multiply
   30,858.71x = 42,585.15 × 17,430.12
4. Step 4: Simplify right side
   30,858.71x = 742,264,274.72
5. Step 5: Solve for x
   x = 742,264,274.72/30,858.71
6. Step 6: Final answer
   x = 24,053.64