Finding the Fourth Proportional to 91,116.28, 136,538.34 and 74,592.28

Step by Step Solution

1. Step 1: Write the proportion equation
   91,116.28 : 136,538.34 = 74,592.28 : x
2. Step 2: Convert to fraction form
   91,116.28/136,538.34 = 74,592.28/x
3. Step 3: Cross multiply
   91,116.28x = 136,538.34 × 74,592.28
4. Step 4: Simplify right side
   91,116.28x = 10,184,706,088.02
5. Step 5: Solve for x
   x = 10,184,706,088.02/91,116.28
6. Step 6: Final answer
   x = 111,777.02