Finding the Fourth Proportional to 13,139,835.72, 18,132,424.43 and 7,557,657.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139,835.72 : 18,132,424.43 = 7,557,657.72 : x
2. Step 2: Convert to fraction form
   13,139,835.72/18,132,424.43 = 7,557,657.72/x
3. Step 3: Cross multiply
   13,139,835.72x = 18,132,424.43 × 7,557,657.72
4. Step 4: Simplify right side
   13,139,835.72x = 137,038,657,369,921.22
5. Step 5: Solve for x
   x = 137,038,657,369,921.22/13,139,835.72
6. Step 6: Final answer
   x = 10,429,251.96