Finding the Fourth Proportional to 31,139,072.48, 42,971,748.96 and 17,201,386.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,139,072.48 : 42,971,748.96 = 17,201,386.40 : x
2. Step 2: Convert to fraction form
   31,139,072.48/42,971,748.96 = 17,201,386.40/x
3. Step 3: Cross multiply
   31,139,072.48x = 42,971,748.96 × 17,201,386.40
4. Step 4: Simplify right side
   31,139,072.48x = 739,173,658,144,758.12
5. Step 5: Solve for x
   x = 739,173,658,144,758.12/31,139,072.48
6. Step 6: Final answer
   x = 23,737,818.74