Finding the Fourth Proportional to 42,543.90, 63,826.18 and 12,962.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,543.90 : 63,826.18 = 12,962.30 : x
2. Step 2: Convert to fraction form
   42,543.90/63,826.18 = 12,962.30/x
3. Step 3: Cross multiply
   42,543.90x = 63,826.18 × 12,962.30
4. Step 4: Simplify right side
   42,543.90x = 827,333,741.48
5. Step 5: Solve for x
   x = 827,333,741.48/42,543.90
6. Step 6: Final answer
   x = 19,446.59