Finding the Fourth Proportional to 91,588.56, 137,402.52 and 28,407.36

Step by Step Solution

1. Step 1: Write the proportion equation
   91,588.56 : 137,402.52 = 28,407.36 : x
2. Step 2: Convert to fraction form
   91,588.56/137,402.52 = 28,407.36/x
3. Step 3: Cross multiply
   91,588.56x = 137,402.52 × 28,407.36
4. Step 4: Simplify right side
   91,588.56x = 3,903,242,850.55
5. Step 5: Solve for x
   x = 3,903,242,850.55/91,588.56
6. Step 6: Final answer
   x = 42,617.14