Finding the Fourth Proportional to 56,531.79, 78,013.52 and 31,038.61

Step by Step Solution

1. Step 1: Write the proportion equation
   56,531.79 : 78,013.52 = 31,038.61 : x
2. Step 2: Convert to fraction form
   56,531.79/78,013.52 = 31,038.61/x
3. Step 3: Cross multiply
   56,531.79x = 78,013.52 × 31,038.61
4. Step 4: Simplify right side
   56,531.79x = 2,421,431,222.01
5. Step 5: Solve for x
   x = 2,421,431,222.01/56,531.79
6. Step 6: Final answer
   x = 42,833.09