Finding the Fourth Proportional to 42,085.72, 63,117.78 and 12,495.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,085.72 : 63,117.78 = 12,495.52 : x
2. Step 2: Convert to fraction form
   42,085.72/63,117.78 = 12,495.52/x
3. Step 3: Cross multiply
   42,085.72x = 63,117.78 × 12,495.52
4. Step 4: Simplify right side
   42,085.72x = 788,689,482.35
5. Step 5: Solve for x
   x = 788,689,482.35/42,085.72
6. Step 6: Final answer
   x = 18,740.07