Finding the Fourth Proportional to 99,365.67, 137,125.17 and 56,926.89

Step by Step Solution

1. Step 1: Write the proportion equation
   99,365.67 : 137,125.17 = 56,926.89 : x
2. Step 2: Convert to fraction form
   99,365.67/137,125.17 = 56,926.89/x
3. Step 3: Cross multiply
   99,365.67x = 137,125.17 × 56,926.89
4. Step 4: Simplify right side
   99,365.67x = 7,806,109,468.82
5. Step 5: Solve for x
   x = 7,806,109,468.82/99,365.67
6. Step 6: Final answer
   x = 78,559.42