Finding the Fourth Proportional to 40,994.16, 61,499.88 and 13,290

Step by Step Solution

1. Step 1: Write the proportion equation
   40,994.16 : 61,499.88 = 13,290 : x
2. Step 2: Convert to fraction form
   40,994.16/61,499.88 = 13,290/x
3. Step 3: Cross multiply
   40,994.16x = 61,499.88 × 13,290
4. Step 4: Simplify right side
   40,994.16x = 817,333,405.20
5. Step 5: Solve for x
   x = 817,333,405.20/40,994.16
6. Step 6: Final answer
   x = 19,937.80