Finding the Fourth Proportional to 42,133,538.08, 58,128,258.24 and 31,146,667.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,133,538.08 : 58,128,258.24 = 31,146,667.12 : x
2. Step 2: Convert to fraction form
   42,133,538.08/58,128,258.24 = 31,146,667.12/x
3. Step 3: Cross multiply
   42,133,538.08x = 58,128,258.24 × 31,146,667.12
4. Step 4: Simplify right side
   42,133,538.08x = 1,810,501,509,666,677.25
5. Step 5: Solve for x
   x = 1,810,501,509,666,677.25/42,133,538.08
6. Step 6: Final answer
   x = 42,970,554.86