Finding the Fourth Proportional to 42,156.16, 63,194.64 and 14,434.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,156.16 : 63,194.64 = 14,434.72 : x
2. Step 2: Convert to fraction form
   42,156.16/63,194.64 = 14,434.72/x
3. Step 3: Cross multiply
   42,156.16x = 63,194.64 × 14,434.72
4. Step 4: Simplify right side
   42,156.16x = 912,196,933.90
5. Step 5: Solve for x
   x = 912,196,933.90/42,156.16
6. Step 6: Final answer
   x = 21,638.52