Finding the Fourth Proportional to 91,603, 137,419.92 and 31,615.12

Step by Step Solution

1. Step 1: Write the proportion equation
   91,603 : 137,419.92 = 31,615.12 : x
2. Step 2: Convert to fraction form
   91,603/137,419.92 = 31,615.12/x
3. Step 3: Cross multiply
   91,603x = 137,419.92 × 31,615.12
4. Step 4: Simplify right side
   91,603x = 4,344,547,261.19
5. Step 5: Solve for x
   x = 4,344,547,261.19/91,603
6. Step 6: Final answer
   x = 47,428.00