Finding the Fourth Proportional to 91,620.61, 138,055.06 and 75,345.22

Step by Step Solution

1. Step 1: Write the proportion equation
   91,620.61 : 138,055.06 = 75,345.22 : x
2. Step 2: Convert to fraction form
   91,620.61/138,055.06 = 75,345.22/x
3. Step 3: Cross multiply
   91,620.61x = 138,055.06 × 75,345.22
4. Step 4: Simplify right side
   91,620.61x = 10,401,788,867.81
5. Step 5: Solve for x
   x = 10,401,788,867.81/91,620.61
6. Step 6: Final answer
   x = 113,531.10