Finding the Fourth Proportional to 99,364.67, 137,082.78 and 56,335.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,364.67 : 137,082.78 = 56,335.10 : x
2. Step 2: Convert to fraction form
   99,364.67/137,082.78 = 56,335.10/x
3. Step 3: Cross multiply
   99,364.67x = 137,082.78 × 56,335.10
4. Step 4: Simplify right side
   99,364.67x = 7,722,572,119.58
5. Step 5: Solve for x
   x = 7,722,572,119.58/99,364.67
6. Step 6: Final answer
   x = 77,719.50