Finding the Fourth Proportional to 109,516.09, 164,275.44 and 42,987.55

Step by Step Solution

1. Step 1: Write the proportion equation
   109,516.09 : 164,275.44 = 42,987.55 : x
2. Step 2: Convert to fraction form
   109,516.09/164,275.44 = 42,987.55/x
3. Step 3: Cross multiply
   109,516.09x = 164,275.44 × 42,987.55
4. Step 4: Simplify right side
   109,516.09x = 7,061,798,690.77
5. Step 5: Solve for x
   x = 7,061,798,690.77/109,516.09
6. Step 6: Final answer
   x = 64,481.84