Finding the Fourth Proportional to 42,321.60, 63,486.72 and 14,616

Step by Step Solution

1. Step 1: Write the proportion equation
   42,321.60 : 63,486.72 = 14,616 : x
2. Step 2: Convert to fraction form
   42,321.60/63,486.72 = 14,616/x
3. Step 3: Cross multiply
   42,321.60x = 63,486.72 × 14,616
4. Step 4: Simplify right side
   42,321.60x = 927,921,899.52
5. Step 5: Solve for x
   x = 927,921,899.52/42,321.60
6. Step 6: Final answer
   x = 21,925.49