Finding the Fourth Proportional to 91,507.05, 137,066.18 and 56,515.05

Step by Step Solution

1. Step 1: Write the proportion equation
   91,507.05 : 137,066.18 = 56,515.05 : x
2. Step 2: Convert to fraction form
   91,507.05/137,066.18 = 56,515.05/x
3. Step 3: Cross multiply
   91,507.05x = 137,066.18 × 56,515.05
4. Step 4: Simplify right side
   91,507.05x = 7,746,301,733.43
5. Step 5: Solve for x
   x = 7,746,301,733.43/91,507.05
6. Step 6: Final answer
   x = 84,652.51