Finding the Fourth Proportional to 99,139,833.09, 136,806,972.17 and 55,085,325.57

Step by Step Solution

1. Step 1: Write the proportion equation
   99,139,833.09 : 136,806,972.17 = 55,085,325.57 : x
2. Step 2: Convert to fraction form
   99,139,833.09/136,806,972.17 = 55,085,325.57/x
3. Step 3: Cross multiply
   99,139,833.09x = 136,806,972.17 × 55,085,325.57
4. Step 4: Simplify right side
   99,139,833.09x = 7,536,056,602,230,379
5. Step 5: Solve for x
   x = 7,536,056,602,230,379/99,139,833.09
6. Step 6: Final answer
   x = 76,014,416.88