Finding the Fourth Proportional to 91,904.10, 137,564.55 and 91,904.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,904.10 : 137,564.55 = 91,904.10 : x
2. Step 2: Convert to fraction form
   91,904.10/137,564.55 = 91,904.10/x
3. Step 3: Cross multiply
   91,904.10x = 137,564.55 × 91,904.10
4. Step 4: Simplify right side
   91,904.10x = 12,642,746,159.66
5. Step 5: Solve for x
   x = 12,642,746,159.66/91,904.10
6. Step 6: Final answer
   x = 137,564.55