Finding the Fourth Proportional to 99,278.53, 137,005.27 and 53,956.63

Step by Step Solution

1. Step 1: Write the proportion equation
   99,278.53 : 137,005.27 = 53,956.63 : x
2. Step 2: Convert to fraction form
   99,278.53/137,005.27 = 53,956.63/x
3. Step 3: Cross multiply
   99,278.53x = 137,005.27 × 53,956.63
4. Step 4: Simplify right side
   99,278.53x = 7,392,342,111.31
5. Step 5: Solve for x
   x = 7,392,342,111.31/99,278.53
6. Step 6: Final answer
   x = 74,460.63