Finding the Fourth Proportional to 42,230, 63,355.80 and 14,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,230 : 63,355.80 = 14,528.72 : x
2. Step 2: Convert to fraction form
   42,230/63,355.80 = 14,528.72/x
3. Step 3: Cross multiply
   42,230x = 63,355.80 × 14,528.72
4. Step 4: Simplify right side
   42,230x = 920,478,678.58
5. Step 5: Solve for x
   x = 920,478,678.58/42,230
6. Step 6: Final answer
   x = 21,796.80