Finding the Fourth Proportional to 61,048.72, 91,631.40 and 37,720.72

Step by Step Solution

1. Step 1: Write the proportion equation
   61,048.72 : 91,631.40 = 37,720.72 : x
2. Step 2: Convert to fraction form
   61,048.72/91,631.40 = 37,720.72/x
3. Step 3: Cross multiply
   61,048.72x = 91,631.40 × 37,720.72
4. Step 4: Simplify right side
   61,048.72x = 3,456,402,382.61
5. Step 5: Solve for x
   x = 3,456,402,382.61/61,048.72
6. Step 6: Final answer
   x = 56,617.11