Finding the Fourth Proportional to 42,081.57, 63,088.97 and 21,010.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42,081.57 : 63,088.97 = 21,010.77 : x
2. Step 2: Convert to fraction form
   42,081.57/63,088.97 = 21,010.77/x
3. Step 3: Cross multiply
   42,081.57x = 63,088.97 × 21,010.77
4. Step 4: Simplify right side
   42,081.57x = 1,325,547,733.15
5. Step 5: Solve for x
   x = 1,325,547,733.15/42,081.57
6. Step 6: Final answer
   x = 31,499.48