Finding the Fourth Proportional to 99,770.96, 137,687.15 and 56,749.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99,770.96 : 137,687.15 = 56,749.34 : x
2. Step 2: Convert to fraction form
   99,770.96/137,687.15 = 56,749.34/x
3. Step 3: Cross multiply
   99,770.96x = 137,687.15 × 56,749.34
4. Step 4: Simplify right side
   99,770.96x = 7,813,655,314.02
5. Step 5: Solve for x
   x = 7,813,655,314.02/99,770.96
6. Step 6: Final answer
   x = 78,315.93